In America, more than anywhere else in the world, care has been taken constantly to trace clearly distinct spheres of action for the two sexes, and both are required to keep in step, but along paths that are never the same.

The only justification for our concepts and system of concepts is that they serve to represent the complex of our experiences; beyond this they have no legitimacy. I am convinced that the philosophers have had a harmful effect upon the progress of scientific thinking in removing certain fundamental concepts from the domain of empiricism, where they are under our control, to the intangible heights of the a priori. For even if it should appear that the universe of ideas cannot be deduced from experience by logical means, but is, in a sense, a creation of the human mind, without which no science is possible, nevertheless the universe of ideas is just as little independent of the nature of our experience as clothes are of the form of the human body. This is particularly true of our concepts of time and space, which physicists have been obliged by the facts to bring down from the Olympus of the a priori in order to adjust them and put them in a serviceable condition.

In anything fit to be called by the name of reading, the process itself should be absorbing and voluptuous; we should gloat over a book, be rapt clean out of ourselves, and rise from the perusal, our mind filled with the busiest, kaleidoscopic dance of images, incapable of sleep or of continuous thought. The words, if the book be eloquent, should run thenceforward in our ears like the noise of breakers, and the story, if it be a story, repeat itself in a thousand coloured pictures to the eye.

The heterodox current in Judaism led by Jesus seems to have had no notion of an immortal soul, created by God and then infused into the body: immortality meant being raised from the dead in the body one had in life, then living for ever in a world without decay or corruption. In the Christian religion invented by Paul and Augustine, which was strongly influenced by Plato, immortality meant something quite different - a life out of time, enjoyed by the 'soul' or 'spirit' of the departed. How this Platonic immortality could preserve anything like the persons that once lived was not made clear.

In the Platonic dialectic, ... the terms "Being" "Non-being" "Movement," "the One and the Many" "Identity" and "Contradiction" are methodically kept open, ambiguous, not fully defined. They have an open horizon, an entire universe of meaning which is gradually structured in the process of communication itself, but which is never closed. The propositions are submitted, developed, and tested in a dialogue, in which the partner is led to question the normally unquestioned universe of experience and speech, and to enter a new dimension of discourse - otherwise he is free and the discourse is addressed to his freedom. He is supposed to go beyond that which is given to him - as the speaker, in his proposition, goes beyond the initial setting of the terms. These terms have many meanings because the conditions to which they refer have many sides, implications, and effects which cannot be insulated and stabilized.

He who is bent on doing evil can never want occasion.

By the removal of the unnecessary mouths, and by extracting from the farmer the full value of the farm, a greater surplus, or what is the same thing, the price of a greater surplus, was obtained for the proprietor...

A horse at the end of the race...A dog when the hunt is over...A bee with its honey stored...And a human being after helping others. They don't make a fuss about it. They just go on to something else, as the vine looks forward to bearing fruit again in season. We should be like that. Acting almost unconsciously.

This art, which I call the art of persuading, and which, properly speaking, is simply the process of perfect methodical proofs, consists of three essential parts: of defining the terms of which we should avail ourselves by clear definitions, of proposing principles of evident axioms to prove the thing in question; and of always mentally substituting in the demonstrations the definition in the place of the thing defined.

Be not unwilling in what thou doest, neither selfish nor unadvised nor obstinate; let not over-refinement deck out thy thought; be not wordy nor a busybody.

The appreciation of the merits of art (of the emotions it conveys) depends upon an understanding of the meaning of life, what is seen as good and evil. Good and evil are defined by religions.

Courtiers don't take wagers against the king's skill.

There are people who believe everything is sane and sensible that is done with a solemn face. ... It is no great art to say something briefly when, like Tacitus, one has something to say; when one has nothing to say, however, and none the less writes a whole book and makes truth ... into a liar - that I call an achievement.

I too have sworn heedlessly and all the time, I have had this most repulsive and death-dealing habit. I'm telling your graces; from the moment I began to serve God, and saw what evil there is in forswearing oneself, I grew very afraid indeed, and out of fear I applied the brakes to this old, old, habit.

If you want good laws, burn those you have and make new ones.

The African [slave] trade was, in his opinion, an absolute robbery. It therefore could not be a doubt with the House, whether it was proper to abolish it.

If each us had a different kind of sense perception — if we could only perceive things now as a bird, now as a worm, now as a plant, or if one of us saw a stimulus as red, another as blue, while a third even heard the same stimulus as a sound, then no one would speak of such a regularity of nature, rather, nature would be grasped only as a creation which is subjective in the highest degree. After all, what is a law of nature as such for us? We are not acquainted with it in itself, but only with its effects, which means in its relation to other laws of nature which, in turn, are known to us only as sums of relations. Therefore all these relations always refer again to others and are thoroughly incomprehensible to us in their essence.

All systems of morality are based on the idea that an action has consequences that legitimize or cancel it. A mind imbued with the absurd merely judges that those consequences must be considered calmly. It is ready to pay up. In other words, there may be responsible persons, but there are no guilty ones, in its opinion. At very most, such a mind will consent to use past experience as a basis for its future actions.

Thus, all unknown quantities can be expressed in terms of a single quantity, whenever the problem can be constructed by means of circles and straight lines, or by conic sections, or even by some other curve of degree not greater than the third or fourth.But I shall not stop to explain this in more detail, because I should deprive you of the pleasure of mastering it yourself, as well as of the advantage of training your mind by working over it, which is in my opinion the principal benefit to be derived from this science. Because, I find nothing here so difficult that it cannot be worked out by anyone at all familiar with ordinary geometry and with algebra, who will consider carefully all that is set forth in this treatise.

To fall into mere unreasoning deliquium of love and admiration, was not good; but such unreasoning, nay irrational supercilious no-love at all is perhaps still worse!-It is a thing forever changing, this of Hero-worship: different in each age, difficult to do well in any age. Indeed, the heart of the whole business of the age, one may say, is to do it well.

"If a nation expects to be ignorant and free," said Jefferson, "it expects what never was and never will be."

It is almost never when a state of things is the most detestable that it is smashed, but when, beginning to improve, it permits men to breathe, to reflect, to communicate their thoughts with each other, and to gauge by what they already have the extent of their rights and their grievances. The weight, although less heavy, seems then all the more unbearable.

God offers to every mind its choice between truth and repose.

Every subjective phenomenon is essentially connected with a single point of view, and it seems inevitable that an objective physical theory will abandon that point of view.

I never consider a difference of opinion in politics, in religion, in philosophy, as cause for withdrawing from a friend.

When two do the same thing, it is not the same thing after all.

In order to succeed, we must first believe that we can.

He who gives himself entirely to his fellow-men appears to them useless and selfish; but he who gives himself partially to them is pronounced a benefactor and philanthropist.

I was taught in the sixth grade that we had a standing army of just over a hundred thousand men and that the generals had nothing to say about what was done in Washington. I was taught to be proud of that and to pity Europe for having more than a million men under arms and spending all their money on airplanes and tanks. I simply never unlearned junior civics. I still believe in it. I got a very good grade.

A teacher's major contribution may pop out anonymously in the life of some ex-student's grandchild. A teacher, finally, has nothing to go on but faith, a student nothing to offer in return but testimony.

Therefore only an utterly senseless person can fail to know that our characters are the result of our conduct.

The scientific enterprise as a whole does from time to time prove useful, open up new territory, display order, and test long-accepted belief. Nevertheless, the individual engaged on a normal research problem is almost never doing any one of these things. Once engaged, his motivation is of a rather different sort. What then challenges him is the conviction that, if only he is skillful enough, he will succeed in solving a puzzle that no one before has solved or solved so well.

We might liken the 'two selves' to Laurel and Hardy. Ollie is the objective mind, 'you'. Stan is the subjective mind, the 'hidden you'. But Stan happens to be in control of your energy supply. So if you wake up feeling low and discouraged, you (Ollie) tend to transmit your depression to Stan, who fails to send you energy, which makes you feel lower than ever. This vicious circle is the real cause of most mental illness.

Cato the elder wondered how that city was preserved wherein a fish was sold for more than an ox.

The devil, depend upon it, can sometimes do a very gentlemanly thing.

There will always be some people who think for themselves, even among the self-appointed guardians of the great mass who, after having thrown off the yoke of immaturity themselves, will spread about them the spirit of a reasonable estimate of their own value and of the need for every man to think for himself.

For socialism is not merely the labour question, it is before all things the atheistic question, the question of the form taken by atheism to-day, the question of the tower of Babel built without God, not to mount to heaven from earth but to set up heaven on earth.

Plato had defined Man as an animal, biped and featherless, and was applauded. Diogenes plucked a fowl and brought it into the lecture-room with the words, "Behold Plato's man!"

Every act of courage is the work of an unbalanced man. Animals, normal by definition, are always cowardly except when they know themselves to be stronger, which is cowardice itself.

How can it be that mathematics, being, after all, a product of human thought which is independent of experience, is so admirably appropriate to the objects of reality? Is human reason, then, without experience, merely by taking thought, able to fathom the properties of real things?

It is not titles that make men illustrious, but men who make titles illustrious.

Inventors and geniuses have almost always been looked on as no better than fools at the beginning of their career, and very frequently at the end of it also.

Without consciousness the mind-body problem would be much less interesting. With consciousness it seems hopeless.

Without disarmament there can be no lasting peace. On the contrary, the continuation of military armaments in their present extent will with certainty lead to new catastrophies...For the creation of this public opinion in favor of disarmament every person living shares the responsibility, through ever deed and every word.

This, therefore, is mathematics: she reminds you of the invisible form 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.

Physics is mathematical not because we know so much about the physical world, but because we know so little: it is only its mathematical properties that we can discover.

We are accustomed to speak of ideas as reproduced, as passed from mind to mind, as similar or dissimilar to one another, and, in short, as if they were substantial things; nor can any reasonable objection be raised to such expressions. But taking the word "idea" in the sense of an event in an individual consciousness, it is clear that an idea once past is gone forever, and any supposed recurrence of it is another idea. These two ideas are not present in the same state of consciousness, and therefore cannot possibly be compared.

If you are well-to-do and can maintain your household, love your wife in your home according to good custom...Make her happy while you are alive, for she is land profitable to her lord.

Sovereignty, the freedom unto death, is threatening to a society that is organized around work and production.