The definition of definition is at bottom just what the maxim of pragmatism expresses.

Into the same rivers we step and do not step, we are and are not.

What is it that distinguishes man from animals? It is not his upright posture. That was present in the apes long before the brain began to develop. Nor is it the use of tools. It is something altogether new, a previously unknown quality: self-awareness. Animals, too, have awareness. They are aware of objects; they know this is one thing and that another. But when the human being as such was born he had a new and different consciousness, a consciousness of himself; he knew that he existed and that he was something different, something apart from nature, apart from other people, too. He experienced himself. He was aware that he thought and felt. As far as we know, there is nothing analogous to this anywhere in the animal kingdom. That is the specific quality that makes human beings human.

Among the celestial bodies that are revolving over our heads, though the motions are not the same, and though the force is not equal, yet they move, and ever have moved, without clashing, and in perfect harmony.

Faced with information overload, we have no alternative but pattern-recognition.

Whoever does not philosophize for the sake of philosophy, but rather uses philosophy as a means, is a sophist.

I would rather discover one cause than gain the kingdom of Persia.

For my own part, I cannot without grief see so much as an innocent beast pursued and killed that has no defence, and from which we have received no offence at all.

Although the Law of Reason is common, the majority of people live as though they had an understanding of their own.

We do not rush toward death, we flee the catastrophe of birth, survivors struggling to forget it. Fear of death is merely the projection into the future of a fear which dates back to our first moment of life. We are reluctant, of course, to treat birth as a scourge: has it not been inculcated as the sovereign good - have we not been told that the worst came at the end, not at the outset of our lives? Yet evil, the real evil, is behind, not ahead of us. What escaped Jesus did not escape Buddha: "If three things did not exist in the world, O disciples, the Perfect One would not appear in the world. ..." And ahead of old age and death he places the fact of birth, source of every infirmity, every disaster.

Giving then to matter all the properties which philosophy knows it has, or all that atheism ascribes to it, and can prove, and even supposing matter to be eternal, it will not account for the system of the universe or of the solar system, because it will not account for motion, and it is motion that preserves it. When, therefore, we discover a circumstance of such immense importance, that without it the universe could not exist, and for which neither matter, nor any, nor all, the properties of matter can account, we are by necessity forced into the rational and comfortable belief of the existence of a cause superior to matter, and that cause man calls, God.

The last thing abandoned by a party is its phraseology, because among political parties, as elsewhere, the vulgar make the language, and the vulgar abandon more easily the ideas that have been instilled into it than the words that it has learnt. France Before The Consulate, Chapter I: "How the Republic was ready to accept a master", in Memoir, Letters, and Remains, Vol I (1862), p. 266 Variant translation: The last thing a political party gives up is its vocabulary. This is because, in party politics as in other matters, it is the crowd who dictates the language, and the crowd relinquishes the ideas it has been given more readily than the words it has learned.

Let no man be ashamed to speak what he is not ashamed to think.

What is patriotism? Is it love of one's birthplace, the place of childhood's recollections and hopes, dreams and aspirations? Is it the place where, in childlike naïveté, we would watch the passing clouds, and wonder why we, too, could not float so swiftly? The place where we would count the milliard glittering stars, terror-stricken lest each one "an eye should be," piercing the very depths of our little souls?

I cannot contribute anything to this world because I only have one method: agony.

To fear is to die every minute.

...I pray to God to make me free of God.

In America, conscription is unknown; men are enlisted for payment. Compulsory recruitment is so alien to the ideas and so foreign to the customs of the people of the United States that I doubt whether they would ever dare to introduce it into their law.

Man has his own inclinations and a natural will which, in his actions, by means of his free choice, he follows and directs. There can be nothing more dreadful than that the actions of one man should be subject to the will of another; hence no abhorrence can be more natural than that which a man has for slavery. And it is for this reason that a child cries and becomes embittered when he must do what others wish, when no one has taken the trouble to make it agreeable to him. He wants to be a man soon, so that he can do as he himself likes.

If we want a love which will protect the soul from wounds we must love something other than God.

Since it is always the same person whose mind thinks, wills, and judges, the autonomous nature of these activities has created great difficulties. Reason's inability to move the will, plus the fact that thinking can only "understand" what is past what neither remove it nor "rejuvenate it" ... have led to the various doctrines asserting the mind's impotence and the force of the irrational, in brief to Hume's famous dictum that "Reason is and ought only to be the slave of the passions," that is, to a rather simple-minded reversal of the Platonic notion of reason's uncontested rulership in the household of the soul. What is so remarkable in all these theories and doctrines is their implicit monism, the claim that behind the obvious multiplicity of the world's appearances and, even more pertinently to our context, behind the obvious plurality of man's faculties and abilities, there must exist a oneness - the old hen pan, "the all is one" - either a single source or a single ruler.

We wish, in a word, equality - equality in fact as a corollary, or rather, as primordial condition of liberty. From each according to his faculties, to each according to his needs; that is what we wish sincerely and energetically.

Christianity is most admirably adapted to the training of slaves, to the perpetuation of a slave society; in short, to the very conditions confronting us to-day.... The rulers of the earth have realized long ago what potent poison inheres in the Christian religion. That is the reason they foster it; that is why they leave nothing undone to instill it into the blood of the people. They know only too well that the subtleness of the Christian teachings is a more powerful protection against rebellion and discontent than the club or the gun.

Anger is a weed; hate is the tree.

When the profits of trade happen to be greater than ordinary, over-trading becomes a general error both among great and small dealers.

There is but one truly serious philosophical problem and that is suicide. Judging whether life is or is not worth living amounts to answering the fundamental question of philosophy. All the rest, whether or not the world has three dimensions, whether the mind has nine or twelve categories comes afterwards. These are games; one must first answer. And if it is true, as Nietzsche claims, that a philosopher, to deserve our respect, must preach by example, you can appreciate the importance of that reply, for it will precede the definitive act. These are facts the heart can feel; yet they call for careful study before they become clear to the intellect. If I ask myself how to judge that this question is more urgent than that, I reply that one judges by the actions it entails. I have never seen anyone die for the ontological argument. 

We are but numbers, born to consume resources.

There was a loud echo of Hume in Mach's work, as both emphasized the tangibility of all knowledge-ultimately, all knowledge is based in the senses. Mach also emphasized the internal nature of all knowledge, in that it is experienced in the mind. Finally, he emphasized the importance of quantitative and mathematical methods and models to understand sensory experience.

The critique of the highest values hitherto does not simply refute them or declare them invalid. It is rather a matter of displaying their origins as impositions which must affirm precisely what ought to be negated by the values established.

The Christian is in a different position from other people who are trying to be good. They hope, by being good, to please God if there is one; or-if they think there is not-at least they hope to deserve approval from good men. But the Christian thinks any good he does comes from the Christ-life inside him. He does not think God will love us because we are good, but that God will make us good because He loves us; just as the roof of a greenhouse does not attract the sun because it is bright, but becomes bright because the sun shines on it.

In order to shake a hypothesis, it is sometimes not necessary to do anything more than push it as far as it will go.

Be your money's master, not its slave.

Limiting the liberty of each by the like liberty of all, excludes a wide range of improper actions, but does not exclude certain other improper ones.

The notion contradicts reality when the latter has become self-contradictory. Hegel says that a prevailing social form can be successfully attacked by thought only if this form has come into open contradiction with its own 'truth,' in other words, if it can no longer fulfill the demands of its own contents.

The way for a person to develop a [writing] style is (a) to know exactly what he wants to say, and (b) to be sure he is saying exactly that. The reader, we must remember, does not start by knowing what we mean. If our words are ambiguous, our meaning will escape him. I sometimes think that writing is like driving sheep down a road. If there is any gate open to the left or the right the readers will most certainly go into it.

To keep our eyes open longer were but to set our Antipodes. The Huntsmen are up in America, and they are already past their first sleep in Persia. But who can be drowsy at that hour which freed us from everlasting sleep? or have slumbering thoughts at that time, when sleep itself must end, and as some conjecture all shall awake again?

I know every numbskull will babble on about "black man," "maneater," "chance," and "retrospective interpretation," in order to banish something terribly inconvenient that might sully the familiar picture of childhood innocence. Ah, these good, efficient, healthy-minded people, they always remind me of those optimistic tadpoles who bask in a puddle in the sun, in the shallowest of waters, crowding together and amiably wriggling their tails, totally unaware that the next morning the puddle will have dried up and left them stranded. On a phallic dream he had as a young child.

It really is worth the trouble to invent a new symbol if we can thus remove not a few logical difficulties and ensure the rigour of the proofs. But many mathematicians seem to have so little feeling for logical purity and accuracy that they will use a word to mean three or four different things, sooner than make the frightful decision to invent a new word.

In its widest possible sense, however, a man's Self is the sum total of all that he can call his, not only his body and his psychic powers, but his clothes and his house, his wife and children, his ancestors and friends, his reputation and works, his lands and horses, and yacht and bank-account. All these things give him the same emotions. If they wax and prosper, he feels triumphant; if they dwindle and die away, he feels cast down.

Evil destroyeth itself.

In fact of course, this 'productive' worker cares as much about the crappy shit he has to make as does the capitalist himself who employs him, and who also couldn't give a damn for the junk.

Poetry teaches the enormous force of a few words, and, in proportion to the inspiration, checks loquacity.

There never was in the world two opinions alike, no more than two hairs or two grains; the most universal quality is diversity.

The good of the people must be the great purpose of government. By the laws of nature and of reason, the governors are invested with power to that end. And the greatest good of the people is liberty. It is to the state what health is to the individual.

The endeavor of scientific research to see events in their more general connection in order to determine their laws, is a legitimate and useful occupation. Any protest against such efforts, in the name of freefom from restrictive conditions, would be fruitless if science did not naïvely identify the abstractions called rules and laws with the actually efficacious forces, and confuse the probability that B will follow A with the actual effort make B follow A.

Concepts, like individuals, have their histories, and are just as incapable of withstanding the ravages of time as are individuals.

When we have weighed everything, and when our relations in life permit us to choose any given position, we may take that one which guarantees us the greatest dignity, which is based on ideas of whose truth we are completely convinced, which offers the largest field to work for mankind and approach the universal goal for which every position is only a means: perfection.

Before his death, Rabbi Zusya said, "In the coming world, they will not ask me: 'Why were you not Moses?' They will ask me: 'Why were you not Zusya?'"