Mind Quotes (116)

... the most essential characteristic of mind is memory, using this word in its broadest sense to include every influence of past experience on present reactions...
Portraits from Memory and Other Essays
See also:  |  Memory (15)

L'art d'enseigner n'est que l'art d'éveiller la curiosité des jeunes âmes pour la satisfaire ensuite.
The whole art of teaching is only the art of awakening the natural curiosity of young minds for the purpose of satisfying it afterwards.
The Crime of Sylvestre Bonnard (1894) translated by Lafcadio Hearn, in The Works of Anatole France in an English Translation (1920), 198.
See also:  |  Child (39)  |  Curiosity (14)  |  Teaching (9)

Ut ager quamvis fertilis sine cultura fructuosus esse non potest, sic sine doctrina animus.
A mind without instruction can no more bear fruit than can a field, however fertile, without cultivation.
In Hannis Taylor and Mary Lillie Taylor Hunt, Cicero: a Sketch of His Life and Works (2nd Ed., 1918), 597.
See also:  |  Education (118)  |  Fertile (2)  |  Field (14)  |  Fruit (9)  |  Instruction (7)

A mind that is stretched by a new idea can never go back to its original dimensions.
Attributed.
See also:  |  Dimension (6)  |  Idea (83)

After that, I thought about what a proposition generally needs in order to be true and certain because, since I had just found one that I knew was such, I thought I should also know what this certainty consists in. Having noticed that there is nothing at all in the proposition 'I think, therefore I am' [cogito ergo sum] which convinces me that I speak the truth, apart from the fact that I see very clearly that one has to exist in order to think, I judged that I could adopt as a general rule that those things we conceive very clearly and distinctly are all true. The only outstanding difficulty is in recognizing which ones we conceive distinctly.
Discourse on Method in Discourse on Method and Related Writings (1637), trans. Desmond M. Clarke, Penguin edition (1999), Part 4, 25.

All interpretations made by a scientist are hypotheses, and all hypotheses are tentative. They must forever be tested and they must be revised if found to be unsatisfactory. Hence, a change of mind in a scientist, and particularly in a great scientist, is not only not a sign of weakness but rather evidence for continuing attention to the respective problem and an ability to test the hypothesis again and again.
The Growth of Biological Thought: Diversity, Evolution and Inheritance (1982), 831.
See also:  |  Ability (11)  |  Attention (6)  |  Change (40)  |  Evidence (31)  |  Hypothesis (83)  |  Interpretation (14)  |  Problem (63)  |  Repetition (3)  |  Revise (3)  |  Scientist (71)  |  Sign (2)  |  Test (12)  |  Thinking (56)  |  Weakness (2)

All other things have a portion of everything, but Mind is infinite and self-ruled, and is mixed with nothing but is all alone by itself.
Simplicius, Commentary on Aristotle's Physics, 164, 24 - 5. In G. S. Kirk, J. E. Raven and M. Schofield (eds.), The Presocratic Philosophers: A Critical History with a Selection of Texts (1983), p. 363.
See also:  |  Aristotle (85)

Always preoccupied with his profound researches, the great Newton showed in the ordinary-affairs of life an absence of mind which has become proverbial. It is related that one day, wishing to find the number of seconds necessary for the boiling of an egg, he perceived, after waiting a minute, that he held the egg in his hand, and had placed his seconds watch (an instrument of great value on account of its mathematical precision) to boil!
This absence of mind reminds one of the mathematician Ampere, who one day, as he was going to his course of lectures, noticed a little pebble on the road; he picked it up, and examined with admiration the mottled veins. All at once the lecture which he ought to be attending to returned to his mind; he drew out his watch; perceiving that the hour approached, he hastily doubled his pace, carefully placed the pebble in his pocket, and threw his watch over the parapet of the Pont des Arts.
Popular Astronomy: a General Description of the Heavens (1884), translated by J. Ellard Gore, (1907), 93.
See also:  |  André-Marie Ampère (5)  |  Anecdote (14)  |  Egg (10)  |  Sir Isaac Newton (82)  |  Pebble (3)  |  Research (208)  |  Watch (4)

And as I had my father's kind of mind–which was also his mother's–I learned that the mind is not sex-typed.
Blackberry Winter: My Earlier Years (1973), 54.
See also:  |  Mother (10)  |  Sex (25)  |  Thinking (56)  |  Type (2)

Artificial intelligence is based on the assumption that the mind can be described as some kind of formal system manipulating symbols that stand for things in the world. Thus it doesn't matter what the brain is made of, or what it uses for tokens in the great game of thinking. Using an equivalent set of tokens and rules, we can do thinking with a digital computer, just as we can play chess using cups, salt and pepper shakers, knives, forks, and spoons. Using the right software, one system (the mind) can be mapped onto the other (the computer).
Machinery of the Mind: Inside the New Science of Artificial Intelligence (1986), 250.
See also:  |  Artificial Intelligence (2)  |  Chess (8)  |  Computer (24)  |  Software (5)  |  Symbol (13)  |  Thinking (56)

As modern physics started with the Newtonian revolution, so modern philosophy starts with what one might call the Cartesian Catastrophe. The catastrophe consisted in the splitting up of the world into the realms of matter and mind, and the identification of 'mind' with conscious thinking. The result of this identification was the shallow rationalism of l' esprit Cartesien, and an impoverishment of psychology which it took three centuries to remedy even in part.
The Act of Creation (1964), 148.
See also:  |  Matter (61)  |  Philosophy (72)  |  Physics (65)  |  Psychology (53)  |  Thinking (56)

Astronomy is a cold, desert science, with all its pompous figures,—depends a little too much on the glass-grinder, too little on the mind. 'T is of no use to show us more planets and systems. We know already what matter is, and more or less of it does not signify.
'Country Life'. The Complete Works of Ralph Waldo Emerson (1904), Vol. 12, 166.
See also:  |  Astronomy (65)  |  Matter (61)  |  Planet (34)  |  Telescope (20)

Break the chains of your prejudices and take up the torch of experience, and you will honour nature in the way she deserves, instead of drawing derogatory conclusions from the ignorance in which she has left you. Simply open your eyes and ignore what you cannot understand, and you will see that a labourer whose mind and knowledge extend no further than the edges of his furrow is no different essentially from the greatest genius, as would have been proved by dissecting the brains of Descartes and Newton; you will be convinced that the imbecile or the idiot are animals in human form, in the same way as the clever ape is a little man in another form; and that, since everything depends absolutely on differences in organisation, a well-constructed animal who has learnt astronomy can predict an eclipse, as he can predict recovery or death when his genius and good eyesight have benefited from some time at the school of Hippocrates and at patients' bedsides.
Machine Man (1747), in Ann Thomson (ed.), Machine Man and Other Writings (1996), 38.
See also:  |  Ape (20)  |  Astronomy (65)  |  Death (91)  |  René Descartes (27)  |  Eclipse (7)  |  Experience (57)  |  Genius (53)  |  Hippocrates (35)  |  Idiot (3)  |  Ignorance (62)  |  Knowledge (330)  |  Nature (243)  |  Sir Isaac Newton (82)  |  Patient (32)  |  Prejudice (10)  |  Recovery (6)

Certainly, it is heaven upon earth, to have a man's mind move in charity, rest in providence, and turn upon the poles of truth.
'Essays or Counsels: Civil and Moral. I. Of Truth'. In Francis Bacon, James Spedding, The Works of Francis Bacon (1864), Vol. 6, 378.
See also:  |  Earth (93)  |  Heaven (18)  |  Man (112)  |  Truth (241)  |  Turn (4)

Complaint was made in 1901 that 'Not so much attention is paid to our children's minds as is paid to their feet.'
Anonymous
Quoted by A.V. Neale in The Advancement of Child Health (1964), 171.
See also:  |  Child (39)  |  Foot (4)

Complexes are psychic contents which are outside the control of the conscious mind. They have been split off from consciousness and lead a separate existence in the unconscious, being at all times ready to hinder or to reinforce the conscious intentions.
Carl Jung
A Psychological Theory of Types (1931), 79.
See also:  |  Complex (8)  |  Unconscious (5)

Curiously enough man's body and his mind appear to differ in their climatic adaptations.
The Red Man's Continent: A Chronicle of Aboriginal America (1919), 10.
See also:  |  Adaptation (9)  |  Climate (14)  |  Man (112)

Electronic aids, particularly domestic computers, will help the inner migration, the opting out of reality. Reality is no longer going to be the stuff out there, but the stuff inside your head. It's going to be commercial and nasty at the same time, like 'Rite of Spring' in Disney's Fantasia ... our internal devils may destroy and renew us through the technological overload we've invoked.
Interview in Heavy Metal (Apr 1971). Reprinted in Re/Search, No. 8/9 (1984).
See also:  |  Aid (2)  |  Commercial (3)  |  Computer (24)  |  Electronics (2)  |  Migration (4)  |  Reality (20)

Even the mind depends so much on temperament and the disposition of one's bodily organs that, if it is possible to find a way to make people generally more wise and more skilful than they have been in the past, I believe that we should look for it in medicine. It is true that medicine as it is currently practiced contains little of much use. Discourse on Method in Discourse on Method and Related Writings (1637), trans. Desmond M. Clarke, Penguin edition (1999), Part 6, 44.
Discourse on Method in Discourse on Method and Related Writings (1637), trans. Desmond M. Clarke, Penguin edition (1999), Part 6, 44.
See also:  |  Medicine (127)

Every Man being conscious to himself, That he thinks, and that which his Mind is employ'd about whilst thinking, being the Ideas, that are there, 'tis past doubt, that Men have in their Minds several Ideas, such as are those expressed by the words, Whiteness, Hardness, Sweetness, Thinking, Motion, Man, Elephant, Army, Drunkenness, and others: It is in the first place then to be inquired, How he comes by them? I know it is a received Doctrine, That Men have native Ideas, and original Characters stamped upon their Minds, in their very first Being.
An Essay Concerning Human Understanding (1690). Edited by Peter Nidditch (1975), Book 2, Chapter 1, Section 1, 104.
See also:  |  Consciousness (10)  |  Doctrine (12)  |  Idea (83)  |  Man (112)  |  Man (112)  |  Thinking (56)

Evolution: At the Mind's Cinema
I turn the handle and the story starts:
Reel after reel is all astronomy,
Till life, enkindled in a niche of sky,
Leaps on the stage to play a million parts.
Life leaves the slime and through all ocean darts;
She conquers earth, and raises wings to fly;
Then spirit blooms, and learns how not to die,-
Nesting beyond the grave in others' hearts.
I turn the handle: other men like me
Have made the film: and now I sit and look
In quiet, privileged like Divinity
To read the roaring world as in a book.
If this thy past, where shall they future climb,
O Spirit, built of Elements and Time?
'Evolution: At the Mind's Cinema' (1922), in The Captive Shrew and Other Poems of a Biologist (1932), 55.
See also:  |  Astronomy (65)  |  Book (39)  |  Death (91)  |  Element (19)  |  Evolution (229)  |  Future (29)  |  Grave (2)  |  Life (155)  |  Life (155)  |  Past (8)  |  Poem (51)  |  Sky (7)  |  Time (55)

Far from becoming discouraged, the philosopher should applaud nature, even when she appears miserly of herself or overly mysterious, and should feel pleased that as he lifts one part of her veil, she allows him to glimpse an immense number of other objects, all worthy of investigation. For what we already know should allow us to judge of what we will be able to know; the human mind has no frontiers, it extends proportionately as the universe displays itself; man, then, can and must attempt all, and he needs only time in order to know all. By multiplying his observations, he could even see and foresee all phenomena, all of nature's occurrences, with as much truth and certainty as if he were deducing them directly from causes. And what more excusable or even more noble enthusiasm could there be than that of believing man capable of recognizing all the powers, and discovering through his investigations all the secrets, of nature!
'Des Mulets', Oeuvres Philosophiques, ed. Jean Piveteau (1954), 414. Quoted in Jacques Roger, The Life Sciences in Eighteenth-Century French Thought, ed. Keith R. Benson and trans. Robert Ellrich (1997), 458.
See also:  |  Enquiry (58)  |  Man (112)  |  Observation (142)  |  Philosopher (33)  |  Truth (241)

Finally, since I thought that we could have all the same thoughts, while asleep, as we have while we are awake, although none of them is true at that time, I decided to pretend that nothing that ever entered my mind was any more true than the illusions of my dreams. But I noticed, immediately afterwards, that while I thus wished to think that everything was false, it was necessarily the case that I, who was thinking this, was something. When I noticed that this truth 'I think, therefore I am' was so firm and certain that all the most extravagant assumptions of the sceptics were unable to shake it, I judged that I could accept it without scruple as the first principle of the philosophy for which I was searching. Then, when I was examining what I was, I realized that I could pretend that I had no body, and that there was no world nor any place in which I was present, but I could not pretend in the same way that I did not exist. On the contrary, from the very fact that I was thinking of doubting the truth of other things, it followed very evidently and very certainly that I existed; whereas if I merely ceased to think, even if all the rest of what I had ever imagined were true, I would have no reason to believe that I existed. I knew from this that I was a substance, the whole essence or nature of which was to think and which, in order to exist, has no need of any place and does not depend on anything material. Thus this self—that is, the soul by which I am what I am—is completely distinct from the body and is even easier to know than it, and even if the body did not exist the soul would still be everything that it is.
Discourse on Method in Discourse on Method and Related Writings (1637), trans. Desmond M. Clarke, Penguin edition (1999), Part 4, 24-5.

For God's sake, please give it up. Fear it no less than the sensual passion, because it, too, may take up all your time and deprive you of your health, peace of mind and happiness in life.
Having himself spent a lifetime unsuccessfully trying to prove Euclid's postulate that parallel lines do not meet, Farkas discouraged his son János from any further attempt.
Letter (1820) to his son, János Bolyai. Translation as in Philip J. Davis and Reuben Hersh, The Mathematical Experience (1981), 220. In Bill Swainson, Encarta Book of Quotations (2000), 124.
See also:  |  Deprive (2)  |  Discouragement (3)  |  Discouragement (3)  |  Euclid (19)  |  Fear (24)  |  Happiness (26)  |  Health (61)  |  Parallel (5)  |  Passion (9)  |  Peace (5)  |  Postulate (7)  |  Time (55)

From the standpoint of observation, then, we must regard it as a highly probable hypothesis that the beginnings of the mental life date from as far back as the beginnings of life at large.

How near one Species to the next is join'd,
The due Gradations please a thinking Mind;
and there are Creatures which no eye can see,
That for a Moment live and breathe like me:
Whom a small Fly in bulk as far exceeds,
As yon tall Cedar does the waving Reeds:
These we can reach—and may we not suppose
There still are Creatures more minute than those.
'The Enquiry'. In Poems Upon Several Occasions (1748), 198.
See also:  |  Breathe (2)  |  Creature (15)  |  Eye (14)  |  Fly (9)  |  Species (49)

I cannot anyhow be contented to view this wonderful universe, and especially the nature of man, and to conclude that everything is the result of brute force. I am inclined to look at everything as resulting from designed laws, with the details, whether good or bad, left to the working out of what we call chance. Not that this notion at all satisfies me. I feel most deeply that the whole subject is too profound for the human intellect. A dog might as well speculate on the mind of Newton. Let each man hope and believe what he can.
Letter to Asa Gray (22 May 1860). In Charles Darwin and Francis Darwin (ed.), Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters (1892), 236.
See also:  |  Belief (37)  |  Brute (3)  |  Chance (33)  |  Conclusion (24)  |  Content (6)  |  Design (12)  |  Detail (7)  |  Dog (6)  |  Hope (14)  |  Inclination (2)  |  Intellect (47)  |  Law (134)  |  Nature Of Man (3)  |  Sir Isaac Newton (82)  |  Profound (5)  |  Result (25)  |  Result (25)  |  Satisfaction (5)  |  Universe (138)  |  Wonder (16)

I feel that, in a sense, the writer knows nothing any longer. He has no moral stance. He offers the reader the contents of his own head, a set of options and imaginative alternatives. His role is that of a scientist, whether on safari or in his laboratory, faced with an unknown terrain or subject. All he can do is to devise various hypotheses and test them against the facts.
Crash (1973, 1995), Introduction. In Barry Atkins, More Than A Game: the Computer Game as a Fictional Form (2003), 144.
See also:  |  Fact (139)  |  Hypothesis (83)  |  Imagination (50)  |  Knowledge (330)  |  Laboratory (36)  |  Reader (2)  |  Science And Art (25)  |  Scientist (71)  |  Test (12)  |  Writer (7)

I know that certain minds would regard as audacious the idea of relating the laws which preside over the play of our organs to those laws which govern inanimate bodies; but, although novel, this truth is none the less incontestable. To hold that the phenomena of life are entirely distinct from the general phenomena of nature is to commit a grave error, it is to oppose the continued progress of science.
Leçons sur les Phenomenes Physiques de la Vie (1836-38), Vol. 1, 6. Trans. J. M. D. Olmsted, François Magendie (1944), 203.
See also:  |  Body (24)  |  Error (97)  |  Idea (83)  |  Inanimate (4)  |  Law (134)  |  Life (155)  |  Nature (243)  |  Novelty (4)  |  Opposition (7)  |  Organ (20)  |  Phenomenon (25)  |  Progress (117)  |  Relationship (10)  |  Truth (241)

I specifically paused to show that, if there were such machines with the organs and shape of a monkey or of some other non-rational animal, we would have no way of discovering that they are not the same as these animals. But if there were machines that resembled our bodies and if they imitated our actions as much as is morally possible, we would always have two very certain means for recognizing that, none the less, they are not genuinely human. The first is that they would never be able to use speech, or other signs composed by themselves, as we do to express our thoughts to others. For one could easily conceive of a machine that is made in such a way that it utters words, and even that it would utter some words in response to physical actions that cause a change in its organs—for example, if someone touched it in a particular place, it would ask what one wishes to say to it, or if it were touched somewhere else, it would cry out that it was being hurt, and so on. But it could not arrange words in different ways to reply to the meaning of everything that is said in its presence, as even the most unintelligent human beings can do. The second means is that, even if they did many things as well as or, possibly, better than anyone of us, they would infallibly fail in others. Thus one would discover that they did not act on the basis of knowledge, but merely as a result of the disposition of their organs. For whereas reason is a universal instrument that can be used in all kinds of situations, these organs need a specific disposition for every particular action.
Discourse on Method in Discourse on Method and Related Writings (1637), trans. Desmond M. Clarke, Penguin edition (1999), Part 5, 40.
See also:  |  Human Body (11)  |  Speech (10)

I used to measure the Heavens, now I measure the shadows of Earth. The mind belonged to Heaven, the body's shadow lies here.
Kepler's epitaph for himself.
Johannes Kepler Gesammelte Werke (1937- ), vol. 19, p. 393.
See also:  |  Body (24)  |  Earth (93)  |  Epitaph (12)  |  Heaven (18)  |  Measurement (62)  |  Shadow (5)

I well know what a spendidly great difference there is [between] a man and a bestia when I look at them from a point of view of morality. Man is the animal which the Creator has seen fit to honor with such a magnificent mind and has condescended to adopt as his favorite and for which he has prepared a nobler life; indeed, sent out for its salvation his only son; but all this belongs to another forum; it behooves me like a cobbler to stick to my last, in my own workshop, and as a naturalist to consider man and his body, for I know scarcely one feature by which man can be distinguished from apes, if it be not that all the apes have a gap between their fangs and their other teeth, which will be shown by the results of further investigation.
T. Fredbärj (ed.), Menniskans Cousiner (Valda Avhandlingar av Carl von Linné nr, 21) (1955), 4. Trans. Gunnar Broberg, 'Linnaeus's Classification of Man', in Tore Frängsmyr (ed.), Linnaeus: The Man and his Work (1983), 167.
See also:  |  Ape (20)  |  Beast (2)  |  Body (24)  |  Creator (6)  |  Difference (25)  |  Distinguish (2)  |  Investigation (25)  |  Man (112)  |  Moral (11)  |  Naturalist (11)  |  Teeth (5)

I'm gradually managing to cram my mind more and more full of things. I've got this beautiful mind and it's going to die, and it'll all be gone. And then I say, not in my case. Every idea I've ever had I've written down, and it's all there on paper. And I won't be gone; it'll be there.
'Isaac Asimov Speaks' with Bill Moyers in The Humanist (Jan/Feb 1989), 49. Reprinted in Carl Howard Freedman (ed.), Conversations with Isaac Asimov (2005), 139.
See also:  |  Biography (152)  |  Death (91)  |  Idea (83)  |  Learning (43)  |  Paper (7)  |  Write (11)

If it were customary to send daughters to school like sons, and if they were then taught the natural sciences, they would learn as thoroughly and understand the subtleties of all the arts and sciences as well as sons. And by chance there happen to be such women, for, as I touched on before, just as women have more delicate bodies than men, weaker and less able to perform many tasks, so do they have minds that are freer and sharper whenever they apply themselves.
The Book of the City of Ladies (1405), part 1, section 27. Trans. Earl Jeffrey Richards (1982), 63.
See also:  |  Education (118)  |  Woman (18)

If one might wish for impossibilities, I might then wish that my children might be well versed in physical science, but in due subordination to the fulness and freshness of their knowledge on moral subjects. ... Rather than have it the principal thing in my son's mind, I would gladly have him think that the sun went round the earth, and that the stars were so many spangles set in the bright blue firmament.
Letter to Dr. Greenhill (9 May 1836). In Arthur Penrhyn Stanley, The Life and Correspondence of Thomas Arnold (2nd Ed., 1846), 277.
See also:  |  Firmament (2)  |  Orbit (16)  |  Son (3)  |  Star (55)  |  Sun (37)

If there is anything that can bind the heavenly mind of man to this dreary exile of our earthly home and can reconcile us with our fate so that one can enjoy living,—then it is verily the enjoyment of the mathematical sciences and astronomy.
In a letter to his son-in-law, Jakob Bartsch. Quoted in Norman Davidson, Sky Phenomena (2004), 131. Also see Johannes Kepler and Carola Baumgardt (ed.), Johannes Kepler: Life and Letters (1951), 190.
See also:  |  Astronomy (65)  |  Earth (93)  |  Fate (7)  |  Man (112)  |  Mathematics (221)  |  Reconcile (4)

In Aristotle the mind, regarded as the principle of life, divides into nutrition, sensation, and faculty of thought, corresponding to the inner most important stages in the succession of vital phenomena.
See also:  |  Aristotle (85)

In attempting to understand the elements out of which mental phenomena are compounded, it is of the greatest importance to remember that from the protozoa to man there is nowhere a very wide gap either in structure or in behaviour. From this fact it is a highly probable inference that there is also nowhere a very wide mental gap..
Lecture II, 'Instinct and Habit' The Analysis of Mind

In so far as the mind is stronger than the body, so are the ills contracted by the mind more severe than those contracted by the body.
The Phillipics. In Mortimer Jerome Adler and Charles Lincoln Van Doren, Great Treasury of Western Thought (3rd Ed., 1977), 311.
See also:  |  Body (24)  |  Contract (2)  |  Strength (4)

In the distant future I see open fields for far more important researches. Psychology will be based on a new foundation, that of the necessary acquirement of each mental power and capacity by gradation. Light will be thrown on the origin of man and his history.
On The Origin of Species by Means of Natural Selection (1859, 1882), 428 .
See also:  |  Foundation (10)  |  Future (29)  |  Origin Of Man (5)  |  Psychology (53)  |  Research (208)

Inexact method of observation, as I believe, is one flaw in clinical pathology to-day. Prematurity of conclusion is another, and in part follows from the first; but in chief part an unusual craving and veneration for hypothesis, which besets the minds of most medical men, is responsible. Except in those sciences which deal with the intangible or with events of long past ages, no treatises are to be found in which hypothesis figures as it does in medical writings. The purity of a science is to be judged by the paucity of its recorded hypotheses. Hypothesis has its right place, it forms a working basis; but it is an acknowledged makeshift, and, at the best, of purpose unaccomplished. Hypothesis is the heart which no man with right purpose wears willingly upon his sleeve. He who vaunts his lady love, ere yet she is won, is apt to display himself as frivolous or his lady a wanton.

The Mechanism and Graphic Registration of the Heart Beat (1920), vii.
See also:  |  Conclusion (24)  |  Craving (2)  |  Event (15)  |  Flaw (4)  |  History (61)  |  Hypothesis (83)  |  Medicine (127)  |  Pathology (3)  |  Paucity (2)  |  Physician (138)  |  Premature (3)  |  Purpose (15)  |  Record (3)  |  Science (444)  |  Treatise (2)

It appears, nevertheless, that all such simple solutions of the problem of vertebrate ancestry are without warrant. They arise from a very common tendency of the mind, against which the naturalist has to guard himself,—a tendency which finds expression in the very widespread notion that the existing anthropoid apes, and more especially the gorilla, must be looked upon as the ancestors of mankind, if once the doctrine of the descent of man from ape-like forefathers is admitted. A little reflexion suffices to show that any given living form, such as the gorilla, cannot possibly be the ancestral form from which man was derived, since ex-hypothesi that ancestral form underwent modification and development, and in so doing, ceased to exist.
'Vertebrata', entry in Encyclopaedia Britannica, 9th edition (1899), Vol. 24, 180.
See also:  |  Ancestor (6)  |  Ape (20)  |  Descent Of Man (3)  |  Development (20)  |  Exist (4)  |  Gorilla (4)  |  Mankind (34)  |  Modification (5)  |  Naturalist (11)  |  Problem (63)  |  Solution (44)  |  Vertebrate (7)

It has sometimes been said that the success of the Origin proved 'that the subject was in the air,' or 'that men's minds were prepared for it.' I do not think that this is strictly true, for I occasionally sounded not a few naturalists, and never happened to come across a single one who seemed to doubt about the permanence of species.
In Charles Darwin and Francis Darwin (ed.), Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters (1892), 42.
See also:  |  Doubt (27)  |  Naturalist (11)  |  Origin Of Species (30)  |  Permanence (3)  |  Subject (11)  |  Success (33)  |  Truth (241)

It hath been an old remark, that Geometry is an excellent Logic. And it must be owned that when the definitions are clear; when the postulata cannot be refused, nor the axioms denied; when from the distinct contemplation and comparison of figures, their properties are derived, by a perpetual well-connected chain of consequences, the objects being still kept in view, and the attention ever fixed upon them; there is acquired a habit of reasoning, close and exact and methodical; which habit strengthens and sharpens the mind, and being transferred to other subjects is of general use in the inquiry after truth.
'The Analyst', in The Works of George Berkeley (1898), Vol. 3, 10.
See also:  |  Axiom (8)  |  Consequence (10)  |  Definition (25)  |  Deny (2)  |  Exact (3)  |  Excellent (2)  |  Geometry (38)  |  Habit (14)  |  Logic (66)  |  Postulate (7)  |  Reasoning (27)  |  Refuse (2)  |  Sharpen (3)  |  Truth (241)  |  Value of Mathematics (2)

It is not the lie that passeth through the mind, but the lie that sinketh in and settleth in it, that doth the hurt.
'Essays or Counsels: Civil and Moral. I. Of Truth'. In Francis Bacon, James Spedding, The Works of Francis Bacon (1864), Vol. 6, 378.
See also:  |  Ignorance (62)  |  Lie (4)  |  Pass (2)  |  Settle (2)  |  Sink (2)

It is worth noting that the notation facilitates discovery. This, in a most wonderful way, reduces the mind's labour.
In Eberhard Zeidler, Applied Functional Analysis: main principles and their applications (1995), 225.
See also:  |  Discovery (166)  |  Labour (7)  |  Notation (2)  |  Reduce (3)

It stands to the everlasting credit of science that by acting on the human mind it has overcome man's insecurity before himself and before nature.
Out of My Later Years (1995), 137.
See also:  |  Insecurity (2)  |  Nature (243)  |  Science (444)

It strikes me as unfair, and even in bad taste, to select a few of them for boundless admiration, attributing superhuman powers of mind and character to them. This has been my fate, and the contrast between the popular estimate of my powers and achievements and the reality is simply grotesque.
The World As I See It (2006), 40.
See also:  |  Achievement (33)  |  Biography (152)

Let every student of nature take this as his rule, that whatever the mind seizes upon with particular satisfaction is to be held in suspicion.
Novum Organum (1620). In Jerome Kagan, Three Seductive Ideas (1998).
See also:  |  Nature (243)  |  Particular (3)  |  Rule (16)  |  Satisfaction (5)  |  Student (17)  |  Suspicion (4)

Let us then suppose the Mind to be, as we say, white Paper, void of all Characters, without any Ideas; How comes it to be furnished? Whence comes it by that vast store, which the busy and boundless Fancy of Man has painted on it, with an almost endless variety? Whence has it all the materials of Reason and Knowledge? To this I answer, in one word, from Experience: In that, all our Knowledge is founded; and from that it ultimately derives it self. Our Observation employ'd either about external, sensible Objects; or about the internal Operations of our Minds, perceived and reflected on by our selves, is that, which supplies our Understandings with all the materials of thinking.
An Essay Concerning Human Understanding (1690). Edited by Peter Nidditch (1975), Book 2, Chapter 1, Section 2, 104.
See also:  |  Experience (57)  |  Idea (83)  |  Knowledge (330)  |  Object (13)  |  Observation (142)  |  Paper (7)  |  Reason (69)  |  Thinking (56)

Lo! the poor Indian! whose untutor’d mind
Sees God in clouds, or hears him in the wind;
His soul proud Science never taught to stray
Far as the solar walk or milky way.
Essay on Man. Epistle I. Line 99. In Alexander Pope, Maynard Mack (Ed.), An Essay on Man (reprint of the Twickenham Edition of the Poems of Alexander Pope, 1982), 27. by Alexander Pope, Maynard Mack - Poetry - 1982 - 186 pages
See also:  |  Cloud (6)  |  God (121)  |  Milky Way (4)  |  Soul (16)  |  Wind (11)

Many arts there are which beautify the mind of man; of all other none do more garnish and beautify it than those arts which are called mathematical.
The Elements of Geometric of the most ancient Philosopher Euclide of Megara (1570), Note to the Reader. In Robert Édouard Moritz, Memorabilia Mathematica; Or, The Philomath's Quotation-book (1914), 44.
See also:  |  Beauty (33)  |  Mathematics (221)  |  Science And Art (25)

Mere numbers cannot bring out ... the intimate essence of the experiment. This conviction comes naturally when one watches a subject at work. ... What things can happen! What reflections, what remarks, what feelings, or, on the other hand, what blind automatism, what absence of ideas! … The experimenter judges what may be going on in [the subject's] mind, and certainly feels difficulty in expressing all the oscillations of a thought in a simple, brutal number, which can have only a deceptive precision. How, in fact, could it sum up what would need several pages of description!
La suggestibilité (1900), 119-20.
See also:  |  Experiment (199)

Mind over matter.
Anonymous
See also:  |  Matter (61)

MIND, n. A mysterious form of matter secreted by the brain. Its chief activity consists in the endeavor to ascertain its own nature, the futility of the attempt being due to the fact that it has nothing but itself to know itself with.
The Collected Works of Ambrose Bierce (1911), Vol. 7, The Devil's Dictionary,  217.
See also:  |  Brain (58)  |  Humour (89)

Newton was not the first of the age of reason. He was the last of the magicians, the last of the Babylonians and Sumerians ... Isaac Newton, a posthumous child born with no father on Christmas Day, 1642, was the last wonder child to whom the Magi could do sincere and appropriate homage... Why do I call him a magician? Because he looked on the whole universe and all that is in it as a riddle, as a secret which could be read by applying pure thought to certain evidence, certain mystic clues which God had laid about the world to allow a sort of philosopher's treasure hunt to the esoteric brotherhood... He regarded the Universe as a cryptogram set by the Almighty—just as he himself wrapt the discovery of the calculus in a cryptogram when he communicated with Leibniz. By pure thought, by concentration of mind, the riddle, he believed, would be revealed to the initiate.
'Newton, the Man' (1946). In Geoffrey Keynes (ed.), Essays in Biography, 2nd edition (1951), 311-4.
See also:  |  Birth (14)  |  Evidence (31)  |  God (121)  |  Gottfried Wilhelm Leibniz (21)  |  Mystery (27)  |  Sir Isaac Newton (82)  |  Philosopher (33)  |  Reason (69)  |  Riddle (2)  |  Secret (11)  |  Thought (65)  |  Universe (138)

Not that we may not, to explain any Phenomena of Nature, make use of any probable Hypothesis whatsoever: Hypotheses, if they are well made, are at least great helps to the Memory, and often direct us to new discoveries. But my Meaning is, that we should not take up anyone too hastily, (which the Mind, that would always penetrate into the Causes of Things, and have Principles to rest on, is very apt to do,) till we have very well examined Particulars, and made several Experiments, in that thing which we would explain by our Hypothesis, and see whether it will agree to them all; whether our Principles will carry us quite through, and not be as inconsistent with one Phenomenon of Nature, as they seem to accommodate and explain another.
An Essay Concerning Human Understanding (1690). Edited by Peter Nidditch (1975), Book 4, Chapter 12, Section 13, 648.
See also:  |  Cause (49)  |  Discovery (166)  |  Experiment (199)  |  Hypothesis (83)  |  Meaning (11)  |  Memory (15)  |  Nature (243)  |  Particular (3)  |  Phenomenon (25)  |  Principle (31)

Nothing could have been worse for the development of my mind than Dr. Butler's school, as it was strictly classical, nothing else being taught, except a little ancient geography and history. The school as a means of education to me was simply a blank. During my whole life I have been singularly incapable of mastering any language. Especial attention was paid to versemaking, and this I could never do well. I had many friends, and got together a good collection of old verses, which by patching together, sometimes aided by other boys, I could work into any subject.
In Charles Darwin and Francis Darwin (ed.), Charles Darwin: His Life Told in an Autobiographical Chapter, and in a Selected Series of His Published Letters (1892), 8.
See also:  |  Ancient (2)  |  Classical (2)  |  Development (20)  |  Education (118)  |  Geography (11)  |  History (61)  |  Language (38)  |  Poetry (35)  |  School (17)  |  Teaching (9)

One of the biggest roles of science fiction is to prepare people to accept the future without pain and to encourage a flexibility of the mind. Politicians should read science fiction, not westerns and detective stories.
(1984) Quoted in Jerome Agel (ed.), The Making of Kubrick's 2001 (4th Ed. 1970), 300. In James E. Combs, Polpop: Politics and Popular Culture in America (1984), 147.
See also:  |  Accept (2)  |  Flexibility (2)  |  Future (29)  |  Pain (30)  |  Politician (5)  |  Read (10)  |  Science Fiction (10)  |  Story (2)

Our knowledge springs from two fundamental sources of the mind; the first is the capacity of receiving representations (receptivity for impressions), the second is the power of knowing an object through these representations (spontaneity [in the production] of concepts).
Critique of Pure Reason (1781), trans. Norman Kemp Smith (1929), 92.
See also:  |  Impression (2)  |  Knowledge (330)  |  Representation (3)

Our mind is so fortunately equipped, that it brings us the most important bases for our thoughts without our having the least knowledge of this work of elaboration. Only the results of it become unconscious.
cit. L.L. Whyte The Unconscious Before Freud (1960)

Our minds are finite, and yet even in these circumstances of finitude we are surrounded by possibilities that are infinite, and the purpose of human life is to grasp as much as we can out of the infinitude.
Dialogue 21 (28 Jun 1941). Dialogues of Alfred North Whitehead (1954, 2001) 160.
See also:  |  Finite (7)  |  Infinite (10)  |  Life (155)

Our natural way of thinking about these coarser emotions is that the mental perception of some fact excites the mental affection called the emotion, and that this latter state of mind gives rise to the bodily expression. My theory, on the contrary, is that the bodily changes follow directly the perception of the exciting fact, and that our feeling of the same changes as they occur IS the emotion. Common-sense says, we lose our fortune, are sorry and weep; we meet a bear, are frightened and run; we are insulted by a rival, are angry and strike. The hypothesis here to be defended says that this order of sequence is incorrect, that the one mental state is not immediately induced by the other, that the bodily manifestations must first be interposed between, and that the more rational statement is that we feel sorry because we cry, angry because we strike, afraid because we tremble, and not that we cry, strike, or tremble, because we are sorry, angry, or fearful, as the case may be. Without the bodily states following on the perception, the latter would be purely cognitive in form, pale, colorless, destitute of emotional warmth. We might then see the bear, and judge it best to run, receive the insult and deem it right to strike, but we should not actually feel afraid or angry.
The Principles or Psychology (1890), Vol. 2, 449-50.
See also:  |  Emotion (16)  |  Fact (139)  |  Hypothesis (83)  |  Perception (5)  |  Theory (179)  |  Thinking (56)

Our purpose is to be able to measure the intellectual capacity of a child who is brought to us in order to know whether he is normal or retarded. ... We do not attempt to establish or prepare a prognosis and we leave unanswered the question of whether this retardation is curable, or even improveable. We shall limit ourselves to ascertaining the truth in regard to his present mental state.
Alfred Binet and Theodore Simon (1873-1961, French psychologist) 'New Methods for the Diagnosis of the Intellectual Level of Subnormals' (1905), in The Development of Intelligence in Children, trans. Elizabeth Kite (1916), 37.
See also:  |  Child (39)  |  Diagnosis (45)  |  Intelligence (31)

Our treasure lies in the beehives of our knowledge. We are perpetually on our way thither, being by nature winged insects and honey gatherers of the mind. The only thing that lies close to our heart is the desire to bring something home to the hive.
The Genealogy of Morals (1887), as translated by Francis Golffing (1956), 149. In another translation, by Maudemarie Clark and Alan J. Swensen, it appears as: 'It has rightly been said: "where your treasure is, there will your heart be also"; our treasure is where the beehives of our knowledge stand. We are forever underway towards them, as born winged animals and honey-gathers of the spirit, concerned will all our heart about only one thing—"bringing home" something.'
See also:  |  Honey (2)  |  Insect (19)  |  Knowledge (330)  |  Treasure (5)

Psychologists must cease to be content with the sterile and narrow conception of their science as the science of consciousness, and must boldly assert its claim to be the positive science of mind in all its aspects and modes of functining, or, as I would prefer to say, the positive science of conduct or behavior.
An Introduction to Social Psychology (1928), 13.
See also:  |  Behaviour (11)  |  Consciousness (10)  |  Nomenclature (51)

Research has been called good business, a necessity, a gamble, a game. It is none of these—it's a state of mind.
Martin H. Fischer, Howard Fabing (ed.) and Ray Marr (ed.), Fischerisms (1944).
See also:  |  Game (7)  |  Research (208)

So far from having a materialistic tendency, the supposed introduction into the earth at successive geological periods of life,—sensation,&mdashinstinct,&mdashthe intelligence of the higher mammalia bordering on reason,—and lastly the improvable reason of Man himself, presents us with a picture of the ever-increasing dominion of mind over matter.
The Antiquity of Man (1863), 506.

Such propositions are therefore called Eternal Truths, not because they are Eternal Truths, not because they are External Propositions actually formed, and antecedent to the Understanding, that at any time makes them; nor because they are imprinted on the Mind from any patterns, that are any where out of the mind, and existed before: But because, being once made, about abstract Ideas, so as to be true, they will, whenever they can be supposed to be made again at any time, past or to come, by a Mind having those Ideas, always actually be true. For names being supposed to stand perpetually for the same ideas, and the same ideas having immutably the same habitudes one to another, Propositions concerning any abstract Ideas that are once true, must needs be eternal Verities.
An Essay Concerning Human Understanding (1690). Edited by Peter Nidditch (1975), Book 4, Chapter 11, Section 14, 638-9.
See also:  |  Abstract (5)  |  Eternal (2)  |  Idea (83)  |  Name (18)  |  Pattern (7)  |  Proposition (8)  |  Truth (241)  |  Understanding (94)

The animal kingdom exhibits a series of mental developments which may be regarded as antecedents to the mental development of man, for the mental life of animals shows itself to be throughout, in its elements and in the general laws governing the combination of the elements, the same as the mental life of man.
Outline of Psychology (1902)
See also:  |  Psychology (53)

The arguments for the two substances [mind and body] have, we believe, entirely lost their validity; they are no longer compatible with ascertained science and clear thinking. The one substance, with two sets of properties, two sides, the physical and the mental—a double-faced unity—would appear to comply with all the exigencies of the case.
Mind and Body: The Theories of their Relation (1872), 196.

The body is most fully developed from thirty to thirty-five years of age, the mind at about forty-nine.
Aristotle
Rhetoric, II, xiv.
See also:  |  Body (24)

The body may be healed but not the mind.
Chinese proverb
See also:  |  Body (24)  |  Healing (6)

The centipede was happy quite, until a toad in fun
Said, 'Pray which leg goes after which?'
That work'd her mind to such a pitch,
She lay distracted in a ditch, considering how to run.
Pinafore Poems in Cassell's Weekly (1871). In Steven Vogel and Rosemary Anne Calvert Life's Devices (1988), 254.
See also:  |  Distraction (2)  |  Insect (19)  |  Poem (51)  |  Run (2)  |  Toad (2)

The cultivation of the mind is a kind of food supplied for the soul of man.
De Finibus Bonorum et Malorum (45-44 B.C.) Vol. 19. In Carl Sagan, Broca's Brain (1986), 38.
See also:  |  Food (36)  |  Soul (16)

The energy of the mind is the essence of life.
Aristotle
Widely quoted, but without citation, for example in Eve Herold, George Daley, Stem Cell Wars (2007), 119. If you know a primary source, please contact Webmaster, who meanwhile believes this might be a popular summary of Aristotle's philosophy, and not his actual statement in these words.
See also:  |  Energy (38)  |  Essence (5)  |  Life (155)

The human mind likes a strange idea as little as the body likes a strange protein and resists it with a similar energy.
The Art of Scientific Investigation (1950).
See also:  |  Idea (83)

The human understanding is moved by those things most which strike and enter the mind simultaneously and suddenly, and so fill the imagination; and then it feigns and supposes all other things to be somehow, though it cannot see how, similar to those few things by which it is surrounded.
Translation of Novum Organum, XLVII. In Francis Bacon, James Spedding, The Works of Francis Bacon (1864), Vol. 8, 80.
See also:  |  Human (37)  |  Imagination (50)  |  Suppose (3)  |  Understanding (94)

The interpretation of dreams is the royal road to a knowledge of the unconscious activities of the mind.
The Interpretation of Dreams (1900), In James Strachey (ed.), The Standard Edition of the Complete Psychological Works of Sigmund Freud (1953), Vol. 5, 608.
See also:  |  Psychoanalysis (19)

The judicial mind is too commonly characterized by a regard for a fourth decimal as the equal of a whole number.
See also:  |  Decimal (5)  |  Number (45)

The man who listens to Reason is lost: Reason enslaves all whose minds are not strong enough to master her.
'Maxims for Revolutionists', in Man and Superman (1905), 239.
See also:  |  Reason (69)  |  Slave (4)

The Mathematics, I say, which effectually exercises, not vainly deludes or vexatiously torments studious Minds with obscure Subtilties, perplexed Difficulties, or contentious Disquisitions; which overcomes without Opposition, triumphs without Pomp, compels without Force, and rules absolutely without Loss of Liberty; which does not privately over-reach a weak Faith, but openly assaults an armed Reason, obtains a total Victory, and puts on inevitable Chains; whose Words are so many Oracles, and Works as many Miracles; which blabs out nothing rashly, nor designs anything from the Purpose, but plainly demonstrates and readily performs all Things within its Verge; which obtrudes no false Shadow of Science, but the very Science itself, the Mind firmly adhering to it, as soon as possessed of it, and can never after desert it of its own Accord, or be deprived of it by any Force of others: Lastly the Mathematics, which depends upon Principles clear to the Mind, and agreeable to Experience; which draws certain Conclusions, instructs by profitable Rules, unfolds pleasant Questions; and produces wonderful Effects; which is the fruitful Parent of, I had almost said all, Arts, the unshaken Foundation of Sciences, and the plentiful Fountain of Advantage to human Affairs.
Address to the University of Cambridge upon being elected Lucasian Professor of Mathematics (14 Mar 1664). In Mathematical Lectures (1734), xxviii.
See also:  |  Advantage (6)  |  Chain (3)  |  Compel (2)  |  Conclusion (24)  |  Difficulty (16)  |  Experience (57)  |  Faith (28)  |  False (13)  |  Foundation (10)  |  Fountain (2)  |  Liberty (3)  |  Mathematics (221)  |  Miracle (10)  |  Oracle (2)  |  Principle (31)  |  Purpose (15)  |  Question (45)  |  Question (45)  |  Rashly (2)  |  Reason (69)  |  Rule (16)  |  Science (444)  |  Science And Art (25)  |  Shadow (5)  |  Victory (3)  |  Word (31)

The mind can proceed only so far upon what it knows and can prove. There comes a point where the mind takes a higher plane of knowledge, but can never prove how it got there. All great discoveries have involved such a leap
Ronald W. Clark, Einstein: The Life and Times (1984), 755.
See also:  |  Discovery (166)  |  Knowledge (330)  |  Proof (59)

The mind has its illusions as the sense of sight; and in the same manner that the sense of feeling corrects the latter, reflection and calculation correct the former.
A Philosophical Essay on Probabilities translated by F.W. Truscott and F.L. Emory (1902), 160.
See also:  |  Calculation (8)

The mind is a vagrant thing ... Thinking is not analogous to a person working in a laboratory who invents something on company time.
Answering criticism that the book for which he won a Pulitzer Prize was written in the years he had been employed at the Smithsonian. He specified that did not write on the premises there, but only at home outside of working hours.
Quoted by Barbara Gamarekian in 'Working Profile: Daniel J. Boorstin. Helping the Library of Congress Fulfill Its Mission', New York Times (8 Jul 1983), B6.
See also:  |  Invention (84)  |  Laboratory (36)

The origin and the causes of disease are far too recondite for the human mind to unravel them.
Praxi Medica (1696), Introduction.
See also:  |  Disease (115)

The popularisation of scientific doctrines is producing as great an alteration in the mental state of society as the material applications of science are effecting in its outward life. Such indeed is the respect paid to science, that the most absurd opinions may become current, provided they are expressed in language, the sound of which recals [sic] some well-known scientific phrase.
'Introductory Lecture on Experimental Physics' (1871). In W. D. Niven (ed.), The Scientific Papers of James Clerk Maxwell (1890), Vol. 2, 242.
See also:  |  Absurd (5)  |  Alteration (2)  |  Doctrine (12)  |  Language (38)  |  Opinion (36)  |  Phrase (2)  |  Respect (7)  |  Science And Society (9)

The principal goal of education is to create men who are capable of doing new things, not simply of repeating what other generations have done—men who are creative, inventive, and discovers. The second goal of education is to form minds which can be critical, can verify, and not accept everything they are offered.
From remarks at a conference on cognitive development, Cornell University (1964). In Philip Hampson Taylor, New Directions in Curriculum Studies (1979), 90.
See also:  |  Creativity (14)  |  Discovery (166)  |  Education (118)  |  Innovation (15)  |  Invention (84)  |  Verify (2)

The psychiatrist is the obstetrician of the mind.
Anonymous
See also:  |  Psychiatrist (6)

The scientific attitude of mind involves a sweeping away of all other desires in the interest of the desire to know.
Mysticism and Logic: And Other Essays (1919), 44.
See also:  |  Attitude (5)  |  Desire (12)  |  Knowledge (330)

The scientific method is a potentiation of common sense, exercised with a specially firm determination not to persist in error if any exertion of hand or mind can deliver us from it. Like other exploratory processes, it can be resolved into a dialogue between fact and fancy, the actual and the possible; between what could be true and what is in fact the case. The purpose of scientific enquiry is not to compile an inventory of factual information, nor to build up a totalitarian world picture of Natural Laws in which every event that is not compulsory is forbidden. We should think of it rather as a logically articulated structure of justifiable beliefs about nature. It begins as a story about a Possible World–a story which we invent and criticise and modify as we go along, so that it ends by being, as nearly as we can make it, a story about real life.
Induction and Intuition in Scientific Thought (1969), 59.
See also:  |  Belief (37)  |  Common Sense (18)  |  Criticism (16)  |  Determination (3)  |  Dialogue (2)  |  Enquiry (58)  |  Error (97)  |  Event (15)  |  Exploration (25)  |  Fact (139)  |  Fact (139)  |  Fancy (3)  |  Information (12)  |  Justification (4)  |  Logic (66)  |  Modify (2)  |  Natural Law (4)  |  Nature (243)  |  Possible (4)  |  Process (15)  |  Real Life (2)  |  Resolve (2)  |  Scientific Method (62)  |  Story (2)  |  Structure (33)  |  Truth (241)

The scientific mind does not so much provide the right answers as ask the right questions.
The Raw and the Cooked: Mythologiques (1990), 7.
See also:  |  Answer (24)  |  Question (45)

The seeds of great discoveries are constantly floating around us, but they only take root in minds well-prepared to receive them.
In C. Guy Suits (ed.), The Collected Works of Irving Langmuir (1962), Vol. 12, 80.
See also:  |  Discovery (166)

The senses at first let in particular Ideas, and furnish the yet empty Cabinet: And the Mind by degrees growing familiar with some of them, they are lodged in the Memory, and Names got to them.
An Essay Concerning Human Understanding (1690). Edited by Peter Nidditch (1975), Book I, Chapter 2, Section 15, 55.
See also:  |  Idea (83)  |  Memory (15)  |  Name (18)  |  Sense (32)  |  Understanding (94)

The White medullary Substance of the Brain is also the immediate Instrument, by which Ideas are presented to the Mind: Or, in other Words, whatever Changes are made in this Substance, corresponding Changes are made in our Ideas; and vice versa.
Observations on Man, His Frame, His Duty, and His Expectations (1749), part 1, 8.
See also:  |  Brain (58)  |  Idea (83)

The wise are instructed by reason; ordinary minds by experience; the stupid, by necessity; and brutes by instinct.
In Charles Simmons, A Laconic Manual and Brief Remarker (1852), 273.
See also:  |  Brute (3)  |  Experience (57)  |  Instinct (13)  |  Instruction (7)  |  Necessity (16)  |  Ordinary (4)  |  Reason (69)  |  Stupid (6)  |  Wise (3)

Then I had shown, in the same place, what the structure of the nerves and muscles of the human body would have to be in order for the animal spirits in the body to have the power to move its members, as one sees when heads, soon after they have been cut off, still move and bite the ground even though they are no longer alive; what changes must be made in the brain to cause waking, sleep and dreams; how light, sounds, odours, tastes, warmth and all the other qualities of external objects can impress different ideas on it through the senses; how hunger, thirst, and the other internal passions can also send their ideas there; what part of the brain should be taken as 'the common sense', where these ideas are received; what should be taken as the memory, which stores the ideas, and as the imagination, which can vary them in different ways and compose new ones and, by the same means, distribute the animal spirits to the muscles, cause the limbs of the body to move in as many different ways as our own bodies can move without the will directing them, depending on the objects that are present to the senses and the internal passions in the body. This will not seem strange to those who know how many different automata or moving machines can be devised by human ingenuity, by using only very few pieces in comparison with the larger number of bones, muscles, nerves, arteries, veins and all the other parts in the body of every animal. They will think of this body like a machine which, having been made by the hand of God, is incomparably better structured than any machine that could be invented by human beings, and contains many more admirable movements.
Discourse on Method in Discourse on Method and Related Writings (1637), trans. Desmond M. Clarke, Penguin edition (1999), Part 5, 39-40.
See also:  |  Brain (58)  |  Human Body (11)

There is nothing evil save that which perverts the mind and shackles the conscience.
In The Life and Times of St. Ambrose (1935), Vol. 2, 461.
See also:  |  Conscience (6)  |  Evil (12)

These Disciplines [mathematics] serve to inure and corroborate the Mind to a constant Diligence in Study; to undergo the Trouble of an attentive Meditation, and cheerfully contend with such Difficulties as lie in the Way. They wholly deliver us from a credulous Simplicity, most strongly fortify us against the Vanity of Scepticism, effectually restrain from a rash Presumption, most easily incline us to a due Assent, perfectly subject us to the Government of right Reason, and inspire us with Resolution to wrestle against the unjust Tyranny of false Prejudices. If the Fancy be unstable and fluctuating, it is to be poized by this Ballast, and steadied by this Anchor, if the Wit be blunt it is sharpened upon this Whetstone; if luxuriant it is pared by this Knife; if headstrong it is restrained by this Bridle; and if dull it is rouzed by this Spur. The Steps are guided by no Lamp more clearly through the dark Mazes of Nature, by no Thread more surely through the intricate Labyrinths of Philosophy, nor lastly is the Bottom of Truth sounded more happily by any other Line. I will not mention how plentiful a Stock of Knowledge the Mind is furnished from these, with what wholesome Food it is nourished, and what sincere Pleasure it enjoys. But if I speak farther, I shall neither be the only Person, nor the first, who affirms it; that while the Mind is abstracted and elevated from sensible Matter, distinctly views pure Forms, conceives the Beauty of Ideas, and investigates the Harmony of Proportions; the Manners themselves are sensibly corrected and improved, the Affections composed and rectified, the Fancy calmed and settled, and the Understanding raised and excited to more divine Contemplations. All which I might defend by Authority, and confirm by the Suffrages of the greatest Philosophers.
Prefatory Oration in Mathematical Lectures (1734), xxxi.
See also:  |  Anchor (2)  |  Beauty (33)  |  Contemplation (5)  |  Difficulty (16)  |  Discipline (4)  |  Idea (83)  |  Knowledge (330)  |  Lamp (3)  |  Maze (2)  |  Nature (243)  |  Philosophy (72)  |  Pleasure (18)  |  Prejudice (10)  |  Reason (69)  |  Scepticism (3)  |  Sharpen (3)  |  Simplicity (30)  |  Study (33)  |  Truth (241)  |  Value of Mathematics (2)  |  Vanity (5)  |  Wit (5)

This characteristic of modern experiments–that they consist principally of measurements,–is so prominent, that the opinion seems to have got abroad, that in a few years all the great physical constants will have been approximately estimated, and that the only occupation which will then be left to men of science will be to carry these measurements to another place of decimals ... But we have no right to think thus of the unsearchable riches of creation, or of the untried fertility of those fresh minds into which these riches will continue to be poured.
[Maxwell strongly disagreed with the prominent opinion, and was attacking it. Thus, he was saying he did not believe
in such a future of merely making 'measurements to another place of decimals.']
'Introductory Lecture on Experimental Physics', Oct 1871. In W. D. Niven (ed.), Scientific Papers (1890), Vol. 2, 244. Note that his reference to making measurements to another place of decimals is often seen extracted as a short quote without the context showing he actually despised that opinion.
See also:  |  Characteristic (12)  |  Creativity (14)  |  Decimal (5)  |  Experiment (199)  |  Measurement (62)  |  Occupation (14)  |  Research (208)  |  Riches (2)

This therefore is Mathematics:
She reminds you of the invisible forms of the soul;
She gives life to her own discoveries;
She awakens the mind and purifies the intellect;
She brings light to our intrinsic ideas;
She abolishes oblivion and ignorance which are ours by birth...
Proclus
Quoted in Benjamin Franklin Finkel, Mathematical Association of America, The American Mathematical Monthly (1947), Vol. 54, 425.
See also:  |  Abolish (2)  |  Discovery (166)  |  Idea (83)  |  Ignorance (62)  |  Intellect (47)  |  Invisible (3)  |  Life (155)  |  Mathematics (221)  |  Oblivion (3)  |  Soul (16)

Too early and perverse sexual satisfaction injures not merely the mind, but also the body; inasmuch as it induces neuroses of the sexual apparatus (irritable weakness of the centres governing erection and ejaculation; defective pleasurable feeling in coitus), while, at the same time, it maintains the imagination and libido in continuous excitement.
Psychopathia Sexualis: With Special Reference to Contrary Sexual Instinct: A Medico-Legal Study (1886), trans. Charles Gilbert Chaddock (1892), 189.
See also:  |  Imagination (50)  |  Neurosis (5)  |  Sex (25)

Tranquility is nothing else than the good ordering of the mind.
Meditations, IV, 3.

Two things fill the mind with ever new and increasing admiration and awe, the oftener and more steadily they are reflected on: the starry heavens above me and the moral law within me.
Critique of Practical Reason (1788). In L. W. Beck (ed. and trans.), Critique of Practical Reason and Other Writings in Moral Philosophy (1949), 258.
See also:  |  Admiration (4)  |  Awe (4)  |  Law (134)  |  Morality (12)  |  Star (55)

Very few of us can now place ourselves in the mental condition in which even such philosophers as the great Descartes were involved in the days before Newton had announced the true laws of the motion of bodies.
'Introductory Lecture on Experimental Physics', 1871. In W. D. Niven (ed.), The Scientific Papers of James Clerk Maxwell (1890), Vol. 2, 241.
See also:  |  René Descartes (27)  |  Sir Isaac Newton (82)  |  Philosopher (33)

We are apt to think we know what time is because we can measure it, but no sooner do we reflect upon it than that illusion goes. So it appears that the range of the measureable is not the range of the knowable. There are things we can measure, like time, but yet our minds do not grasp their meaning. There are things we cannot measure, like happiness or pain, and yet their meaning is perfectly clear to us.
The Elements of Social Science (1921), 15-16
See also:  |  Happiness (26)  |  Knowledge (330)  |  Meaning (11)  |  Measurement (62)  |  Pain (30)  |  Time (55)

We have hitherto considered those Ideas, in the reception whereof, the Mind is only passive, which are those simple ones received from Sensation and Reflection before-mentioned, whereof the Mind cannot make anyone to it self, nor have any Idea which does not wholy consist of them. But as these simple Ideas are observed to exist in several Combinations united together; so the Mind has a power to consider several of them united together, as one Idea; and that not only as they are united in external Objects, but as it self has joined them. Ideas thus made up of several simple ones put together, I call Complex; such as are Beauty, Gratitude, a Man, an Army, the Universe; which tough complicated various simple Ideas, made up of simple ones, yet are, when the Mind pleases, considered each by if self, as one entire thing, and signified by one name.
An Essay Concerning Human Understanding (1690). Edited by Peter Nidditch (1975), Book 2, Chapter 12, Section 1, 163-4.
See also:  |  Army (4)  |  Beauty (33)  |  Complex (8)  |  Gratitude (2)  |  Idea (83)  |  Man (112)  |  Object (13)  |  Reflection (8)  |  Sensation (2)  |  Universe (138)

We have to understand that the world can only be grasped by action, not by contemplation. The hand is more important than the eye ... The hand is the cutting edge of the mind.
The Ascent of Man (1973), 115-6.
See also:  |  Ascent Of Man (5)  |  Understanding (94)

We should like Nature to go no further; we should like it to be finite, like our mind; but this is to ignore the greatness and majesty of the Author of things.
Letter to S. Clarke, 1715. Trans. M. Morris and G. H. R. Parkinson, Leibniz: PhilosophicalWritings (1973), 220.
See also:  |  Finite (7)  |  God (121)  |  Nature (243)

What a glorious title, Nature, a veritable stroke of genius to have hit upon. It is more than a cosmos, more than a universe. It includes the seen as well as the unseen, the possible as well as the actual, Nature and Nature's God, mind and matter. I am lost in admiration of the effulgent blaze of ideas it calls forth.
[Commenting on the title of the journal.]
From 'History' web page of NPG, Nature Publishing Group, www.nature.com.
See also:  |  Admiration (4)  |  Cosmos (6)  |  Genius (53)  |  Idea (83)  |  Matter (61)  |  Nature (243)  |  Nature Journal (5)  |  Universe (138)

What is matter?—Never mind.
What is mind?—No matter.
A Short Cut to Metaphysics (1855), 19.
See also:  |  Matter (61)

When someone says 'I am thinking, therefore I am, or I exist', he does not deduce existence from thought by means of a syllogism, but recognises it as something self-evident by a simple intuition of the mind. This is clear from the fact that if he were deducing it by means of a syllogism, he would have to have had previous knowledge of the major premiss 'Everything which thinks is, or exists'; yet in fact he learns it from experiencing in his own case that it is impossible that he should think without existing. It is in the nature of our mind to construct general propositions on the basis of our knowledge of particular ones.
Author's Replies to the Second set of Objections to Meditations on the First Philosophy (1641), in The Philosophical Writings of Descartes (1985), trans. J. Cottingham, R. Stoothoff and D. Murdoch, Vol. 2, 100.

When you wish to instruct, be brief; that men's minds take in quickly what you say, learn its lesson, and retain it faithfully. Every word that is unnecessary only pours over the side of a brimming mind.
In Norbert Guterman, The Anchor Book of Latin Quotations (1990), 193.
See also:  |  Instruction (7)  |  Learn (11)  |  Lesson (3)  |  Retain (3)  |  Side (2)  |  Unnecessary (2)  |  Word (31)

Where should I start? Start from the statement of the problem. ... What can I do? Visualize the problem as a whole as clearly and as vividly as you can. ... What can I gain by doing so? You should understand the problem, familiarize yourself with it, impress its purpose on your mind.
How to Solve It: a New Aspect of Mathematical Method (1957), 33.
See also:  |  Design (12)  |  Do (10)  |  Experiment (199)  |  Gain (3)  |  Problem (63)  |  Purpose (15)  |  Statement (4)  |  Understanding (94)

Your mind works very simply: you are either trying to find out what are God's laws in order to follow them; or you are trying to outsmart Him.
See also:  |  God (121)

[Magic] enables man to carry out with confidence his important tasks, to maintain his poise and his mental integrity in fits of anger, in the throes of hate, of unrequited love, of despair and anxiety. The function of magic is to ritualize man's optimism, to enhance his faith in the victory of hope over fear. Magic expresses the greater value for man of confidence over doubt, of steadfastness over vacillation, of optimism over pessimism.
Magic, Science and Religion (1925), 90.
See also:  |  Anger (3)  |  Confidence (4)  |  Despair (5)  |  Doubt (27)  |  Enable (2)  |  Faith (28)  |  Fear (24)  |  Function (9)  |  Hate (4)  |  Hope (14)  |  Importance (14)  |  Integrity (2)  |  Love (29)  |  Magic (8)  |  Pessimism (2)  |  Ritual (3)  |  Task (4)  |  Value (10)  |  Victory (3)

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