I maintain that in every special natural doctrine only so much science proper is to be met with as mathematics; for... science proper, especially of nature, requires a pure portion, lying at the foundation of the empirical, and based upon à priori knowledge of natural things. ...the conception should be constructed. But the cognition of the reason through construction of conceptions is mathematical. A pure philosophy of nature in general, namely, one that only investigates what constitutes a nature in general, may thus be possible without mathematics; but a pure doctrine of nature respecting determinate natural things (corporeal doctrine and mental doctrine), is only possible by means of mathematics; and as in every natural doctrine only so much science proper is to be met with therein as there is cognition à priori, a doctrine of nature can only contain so much science proper as there is in it of applied mathematics.

It is the necessary, though very slow and gradual, consequence of a certain propensity in human nature which has in view no such extensive utility; the propensity to truck, barter, and exchange one thing for another.

Americans cleave to the things of this world as if assured that they will never die,... They clutch everything but hold nothing fast, and so lose grip as they hurry after some new delight. ... Death steps in in the end and stops him before he has grown tired of this futile pursuit of that complete felicity which always escapes him. At first sight there is something astonishing in this spectacle of so many lucky men restless in the midst of abundance. But it is a spectacle as old as the world; all that is new is to see a whole people performing in it.

The effects of opposition are wonderful. There are men who rise refreshed on hearing of a threat, - men to whom a crisis which intimidates and paralyzes the majority - demanding, not the faculties of prudence and thrift, but comprehension, immovableness, the readiness of sacrifice - comes graceful and beloved as a bride!

The moral decline we are compelled to witness and the suffering it engenders are so oppressive that one cannot ignore them even for a moment. No matter how deeply one immerses oneself in work, a haunting feeling of inescapable tragedy persists. Still, there are moments when one feels free from one's own identification with human limitations and inadequacies. At such moments, one imagines that one stands on some spot of a small planet, gazing in amazement at the cold yet profoundly moving beauty of the eternal, the unfathomable: life and death flow into one, and there is neither evolution nor destiny; only being.

When there is genuine artistry in scientific inquiry and philosophic speculation, a thinker proceeds neither by rule nor yet blindly, but by means of meaning that exist immediately as feelings having qualitative color.

Every stage of education begins with childhood. That is why the most educated person on earth so much resembles a child.

The art of music is good, for the reason, among others, that it produces pleasure; but what proof is it possible to give that pleasure is good? If, then, it is asserted that there is a comprehensive formula, including all things which are in themselves good, and that whatever else is good, is not so as an end, but as a mean, the formula may be accepted or rejected, but is not a subject of what is commonly understood by proof.

Never unreal, Pain is a challenge to the universal fiction. What luck to be the only sensation granted a content, if not a meaning!

Never self-possessed, or prudent, love is all abandonment.

Beholding beauty with the eye of the mind, he will be enabled to bring forth, not images of beauty, but realities (for he has hold not of an image but of a reality), and bringing forth and nourishing true virtue to become the friend of God and be immortal, if mortal man may.

May we not return to those scoundrels of old, the illustrious founders of superstition and fanaticism, who first took the knife from the altar to make victims of those who refused to be their disciples?

But a punishment like forced labour or even imprisonment - mere loss of liberty - has never functioned without a certain additional element of punishment that certainly concerns the body itself: rationing of food, sexual deprivation, corporal punishment, solitary confinement ... There remains, therefore, a trace of 'torture' in the modern mechanisms of criminal justice - a trace that has not been entirely overcome, but which is enveloped, increasingly, by the non-corporal nature of the penal system

Thus I progressed on the surface of life, in the realm of words as it were, never in reality. All those books barely read, those friends barely loved, those cities barely visited, those women barely possessed! I went through the gestures out of boredom or absent-mindedness. Then came the human beings, they wanted to cling, but there was nothing to cling to, and that was unfortunate for them. As for me, I forgot. I never remembered anything but myself.

There are some defeats more triumphant than victories.

With what consistency, or decency they complain so loudly of attempts to enslave them, while they hold so many hundred thousands in slavery; and annually enslave many thousands more, without any pretence of authority, or claim upon them?

Every man, wherever he goes, is encompassed by a cloud of comforting convictions, which move with him like flies on a summer day.

The journalists have constructed for themselves a little wooden chapel, which they also call the Temple of Fame, in which they put up and take down portraits all day long and make such a hammering you can't hear yourself speak.

Whereas the particular conception of ideology designates only a part of the opponent's assertions as ideologies - and this only with reference to their content, the total conception calls into question the opponent's total Weltanschauung (including his conceptual apparatus), and attempts to understand these concepts as an outgrowth of the collective life of which he partakes.

The biology of suffering in intelligent agents is a deep underlying source of existential risk - and one that can potentially be overcome.

One cannot demand of a scholar that he show himself a scholar everywhere in society, but the whole tenor of his behavior must none the less betray the thinker, he must always be instructive, his way of judging a thing must even in the smallest matters be such that people can see what it will amount to when, quietly and self-collected, he puts this power to scholarly use.

In a liberal society you're not going to agree on the deepest... moral frameworks, but you are going to agree on factual information, and... if you can't agree on factual information it's very hard to deliberate in common... on what needs to be done in the future, and that's the situation we now face.

The rush to California, for instance, and the attitude, not merely of merchants, but of philosophers and prophets, so called, in relation to it, reflect the greatest disgrace on mankind. That so many are ready to live by luck, and so get the means of commanding the labor of others less lucky, without contributing any value to society!

In fact, when a nation has become free, it is extremely difficult to persuade them that their freedom is only to be preserved by perpetual and minute jealousy. They do not observe that there is a constant, perhaps an unconscious, effort on the part of their governors to diminish, and so ultimately to destroy, that freedom.

Temperament refers to the mode of reaction and is constitutional and not changeable; character is essentially formed by a person's experiences, especially of those in early life, and changeable, to some extent, by insights and new kinds of experiences. If a person has a choleric temperament, for instance, his mode of reaction is "quick and strong." But what he is quick or strong about depends on his kind of relatedness, his character. If he is a productive, just, loving person he will react quickly and strongly when he loves, when he is enraged by injustice, and when he is impressed by a new idea. If he is a destructive or sadistic character, he will be quick and strong in his destructiveness or in his cruelty. The confusion between temperament and character has had serious consequences for ethical theory. Preferences with regard to differences in temperament are mere matters of subjective taste. But differences in character are ethically of the most fundamental importance.

Before we can establish any immutable 'principles' of administration, we must be able to describe, in words, exactly how an administrative organization looks and exactly how it works.

What the inventive genius of mankind has bestowed upon us in the last hundred years could have made human life care free and happy if the development of the organizing power of man had been able to keep step with his technical advances. As it is, the hardly bought achievements of the machine age in the hands of our generation are as dangerous as a razor in the hands of a three-year-old child. The possession of wonderful means of production has not brought freedom-only care and hunger.

Freedom can be manifested only in the void of beliefs, in the absence of axioms, and only where the laws have no more authority than a hypothesis.

Create all the happiness you are able to create: remove all the misery you are able to remove. Every day will allow you to add something to the pleasure of others, or to diminish something of their pains. And for every grain of enjoyment you sow in the bosom of another, you shall find a harvest in your own bosom; while every sorrow which you pluck out from the thoughts and feelings of a fellow creature shall be replaced by beautiful peace and joy in the sanctuary of your soul.

The Enlightenment worldview held by Du Bois is ultimately inadequate, and, in many ways, antiquated, for our time. The tragic plight and absurd predicament of Africans here and abroad requires a more profound interpretation of the human condition - one that goes beyond the false dichotomies of expert knowledge vs. mass ignorance, individual autonomy vs. dogmatic authority, and self-mastery vs. intolerant tradition.

Being asked where in Greece he saw good men, he replied, "Good men nowhere, but good boys at Sparta."

This right which you have, is not founded any more than his upon any quality or any merit in yourself which renders you worthy of it. Your soul and your body are, of themselves, indifferent to the state of boatman or that of duke; and there is no natural bond that attaches them to one condition rather than to another.

A man's character is formed by the Odes, developed by the Rites and perfected by music.

Consciousness must essentially cover an interval of time; for if it did not, we could gain no knowledge of time, and not merely no veracious cognition of it, but no conception whatever. We are therefore, forced to say that we are immediately conscious through an infinitesimal interval of time.

Being at one is god-like and good, but human, too human, the mania Which insists there is only the One, one country, one truth, and one way.

If you could be alarmed into the semblance of modesty, you would charm everybody; but remember my joke against you about the Moon and the Solar System;-"Damn the solar system! bad light - planets too distant - pestered with comets - feeble contriviance; - could make a better with great ease."

I don't like the spirit of socialism - I think freedom is the basis of everything.

It is quite possible to be both. I look upon myself as a man. Nationalism is an infantile disease. It is the measles of mankind.

The would-be climber must be able to make himself liked ... please his superiors - avoid showing independence except in those matters wherein independence is expected of him by his chiefs... the winners in the race have qualities which disincline them to allow others to be their true selves. Hence the winners snub all those who aim at adequate self-expression, speaking of them as pretentious, eccentric, biased, unpractical, and measuring their achievements by insincere standards.

Surplus value is exactly equal to surplus labour; the increase of the one [is] exactly measured by the diminution of necessary labour.

Our whole past experience is continually in our consciousness, though most of it sunk to a great depth of dimness. I think of consciousness as a bottomless lake, whose waters seem transparent, yet into which we can clearly see but a little way.

To wish to escape from solitude is cowardice. Friendship is not to be sought, not to be dreamed, not to be desired; it is to be exercised (it is a virtue).

Justice is happiness according to virtue.

We hold, that the moral obligation of providing for old age, helpless infancy, and poverty, is far superior to that of supplying the invented wants of courtly extravagance, ambition and intrigue.

Supply and demand constantly determine the prices of commodities; never balance, or only coincidentally; but the cost of production, for its part, determines the oscillations of supply and demand.