Good prose is written only face to face with poetry.

In skating over thin ice our safety is our speed.

I write to thee on this subject, friend, because I am angry at a book which I have just left, which is so large, that it seems to contain universal science, but it hath almost split my head, without teaching me anything.

Speech is a mirror of the soul; as a man speaks, so is he.

The strangest, most generous, and proudest of all virtues is true courage.

Reason has always existed, but not always in a rational form.

Who, then, can be more ignorant of nature than he who classes this cruel and hurtful vice as belonging to her best and most polished work?

The God idea is growing more impersonal and nebulous in proportion as the human mind is learning to understand natural phenomena and in the degree that science progressively correlates human and social events.

Trade has ever been the extinguisher of war, the eradicator of prejudice, the diffuser of knowledge.

Staying as I am, one foot in one country and the other in another, I find my condition very happy, in that it is free.

We don't need fossils - the case for evolution is watertight without them; so it is paradoxical to use gaps in the fossil record as though they were evidence against evolution.

The whole of science is nothing more than a refinement of every day thinking.

There is no more light in a genius than in any other honest man-but he has a particular kind of lens to concentrate this light into a burning point.

It is a most important social act; nay, at bottom, the one important social act. Given the men a People choose, the People itself, in its exact worth and worthlessness, is given. A heroic people chooses heroes, and is happy; a valet or flunkey people chooses sham-heroes, what are called quacks, thinking them heroes, and is not happy.

They hate not to make use of their abilities... they do not necessarily work for their own self-interest.

As long as one believes in philosophy, one is healthy; sickness begins when one starts to think.

Undoubtedly we have no questions to ask which are unanswerable. We must trust the perfection of the creation so far, as to believe that whatever curiosity the order of things has awakened in our minds, the order of things can satisfy. Every man's condition is a solution in hieroglyphic to those inquiries he would put. He acts it as life, before he apprehends it as truth.

Meanwhile, hold fast to this thought, and grip it close: yield not to adversity; trust not to prosperity; keep before your eyes the full scope of Fortune's power, as if she would surely do whatever is in her power to do.

And when the physician said, "Sir, you are an old man," "That happens," replied Pausanias, "because you never were my doctor."

Yes, I dreamed a dream, my dream of the third of November. They tease me now, telling me it was only a dream. But does it matter whether it was a dream or reality, if the dream made known to me the truth? If once one has recognized the truth and seen it, you know that it is the truth and that there is no other and there cannot be, whether you are asleep or awake. Let it be a dream, so be it, but that real life of which you make so much I had meant to extinguish by suicide, and my dream, my dream - oh, it revealed to me a different life, renewed, grand and full of power!

No critic writing about a film could say more than the film itself, although they do their best to make us think the opposite.

A definition of the political can be obtained only by discovering and defining the specifically political categories.

Therefore death is nothing to us, it matters not one jot, since the nature of the mind is understood to be mortal.

Beware of false prophets, which come to you in sheep's clothing, but inwardly they are ravening wolves.

It is difficulties that show what men are.

We can be knowledgeable with other men's knowledge, but we cannot be wise with other men's wisdom.

Poetry is the mysticism of mankind.

Is a fixed income not a good thing? Does not everyone love to count on a sure thing? Especially every petty-bourgeois, narrow-minded Frenchman? the 'ever needy' man?

The empiricist thinks he believes only what he sees, but he is much better at believing than at seeing.

The world is all that is the case.

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.

As for civilization, from which at last we are about to escape, so far from being the social destiny of man, it is only a transient stage - a state of temporary evil with which globes are afflicted during the first ages of their career; it is for the human race a disease of infancy, like teething; but it is a disease which has been prolonged in our globe at least twenty centuries beyond its natural term, owing to the neglect on the part of the ancient philosophy to study association and passional attraction.

I mean, a genuinely productive society. I mean you could produce plenty of goods without much freedom, but I think the whole sort of creative life of man is ultimately impossible without a considerable measure of individual freedom, of initiative, creation, all these things which we value, and I think value properly, are impossible without a large measure of freedom.

All the gifted souls, of every rank, who are born to you in this generation. These are appointed, by the true eternal "divine right" which will never become obsolete, to be your governors and administrators; and precisely as you employ them, or neglect to employ them, will your State be favored of Heaven or disfavored. This noble young soul, you can have him on either of two conditions; and on one of them, since he is here in the world, you must have him. As your ally and coadjutor; or failing that, as your natural enemy: which shall it be? I consider that every Government convicts itself of infatuation and futility, or absolves and justifies itself before God and man, according as it answers this question.

If a king is energetic, his subjects will be equally energetic. If he is reckless, they will not only be reckless likewise, but also eat into his works. Besides, a reckless king will easily fall into the hands of his enemies. Hence the king shall ever be wakeful.

It doesn't matter that it can't last, that we don't find it more often. To know that there is such perfection, that there has been such perfection - it is worth living for. It exists. It has been - it is. One can contemplate it and feel complete peace.

M. Desargues puts me under obligations on account of the pains that it has pleased him to have in me, in that he shows that he is sorry that I do not wish to study more in geometry, but I have resolved to quit only abstract geometry, that is to say, the consideration of questions which serve only to exercise the mind, and this, in order to study another kind of geometry, which has for its object the explanation of the phenomena of nature... You know that all my physics is nothing else than geometry.

I have no ideas, only obsessions. Anybody can have ideas. Ideas have never caused anybody's downfall.

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 produce these representations in and from ourselves with the same necessity with which the spider spins. If we are forced to comprehend all things only under these forms, then it ceases to be amazing that in all things we actually comprehend nothing but these forms. For they must all bear within themselves the laws of number, and it is precisely number which is most astonishing in things. All that conformity to law, which impresses us so much in the movement of the stars and in chemical processes, coincides at bottom with those properties which we bring to things. Thus it is we who impress ourselves in this way

"Can any good come out of Nazareth?" This is always the question of the wiseacres and the knowing ones. But the good, the new, comes from exactly that quarter whence it is not looked for, and is always something different from what is expected. Everything new is received with contempt, for it begins in obscurity. It becomes a power unobserved.

The erotic is never free of secrecy.

We cannot stem linguistic change, but we can drag our feet. If each of us were to defy Alexander Pope and be the last to lay the old aside, it might not be a better world, but it would be a lovelier language.

Printing will tell you such useful things and such interesting things that not being able to read would be as bad as not being able to see.

A naturall foole that could never learn by heart the order of numerall words, as one, two, and three, may observe every stroak of the Clock, and nod to it, or say one, one, one; but can never know what houre it strikes.

Democracy would be wholly valueless to the proletariat if it were not immediately used as a means for putting through measures directed against private property and ensuring the livelihood of the proletariat.

If therefore my work is negative, irreligious, atheistic, let it be remembered that atheism - at least in the sense of this work - is the secret of religion itself; that religion itself, not indeed on the surface, but fundamentally, not in intention or according to its own supposition, but in its heart, in its essence, believes in nothing else than the truth and divinity of human nature. Preface