The life of a man who deliberately runs through his fortune often becomes a business speculation his friends, his pleasures, patrons, and acquaintances are his capital.
The product of mental labor - science - always stands far below its value, because the labor-time necessary to reproduce it has no relation at all to the labor-time required for its original production.
Marriage, it seems, confines every man to his proper rank.
Not a few other very eminent and scholarly men made the same request, urging that I should no longer through fear refuse to give out my work for the common benefit of students of Mathematics.
To be stupid, selfish, and have good health are three requirements for happiness, though if stupidity is lacking, all is lost.
We must cultivate our own garden. When man was put in the garden of Eden he was put there so that he should work, which proves that man was not born to rest.
All the interests of my reason, speculative as well as practical, combine in the three following questions: 1. What can I know? 2. What ought I to do? 3. What may I hope?
Revolutionaries do not make revolutions. The revolutionaries are those who know when power is lying in the street and then they can pick it up.
It gives me great pleasure indeed to see the stubbornness of an incorrigible nonconformist warmly acclaimed.
When I was young, I observed that nine out of ten things I did were failures. So I did ten times more work.
Ignorant men raise questions that wise men answered a thousand years ago.
The best interpreter of the law is custom.
God helps those who help themselves.
A man can be himself only so long as he is alone.
Education consists mainly of what we have unlearned.
The best way to be boring is to leave nothing out.
Hunger is the best pickle.
If you are lucky enough to have lived in Paris as a young man, then wherever you go for the rest of your life it stays with you, for Paris is a moveable feast.
Virtue is not left to stand alone. He who practices it will have neighbors.
Therefore, when I considered this carefully, the contempt which I had to fear because of the novelty and apparent absurdity of my view, nearly induced me to abandon utterly the work I had begun.
I always pass on good advice. It is the only thing to do with it. It is never of any use to oneself.
When you are courting a nice girl an hour seems like a second. When you sit on a red-hot cinder a second seems like an hour. That's relativity.
The punishment which the wise suffer who refuse to take part in the government, is to live under the government of worse men.
Men are wise in proportion, not to their experience, but to their capacity for experience.
We must conceive of this whole universe as one commonwealth of which both gods and men are members.
It is through art, and through art only, that we can realise our perfection.
Information is not knowledge.
When God desires to destroy a thing, he entrusts its destruction to the thing itself. Every bad institution of this world ends by suicide.
The word 'happiness' would lose its meaning if it were not balanced by sadness.
Those who know how to think need no teachers.
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