When science, art, literature, and philosophy are simply the manifestation of personality they are on a level where glorious and dazzling achievements are possible, which can make a man's name live for thousands of years.

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There is only one passion, the passion for happiness.

His hands would plait the priest's guts, if he had no rope, to strangle kings.

No man has received from nature the right to command his fellow human beings.

Our observation of nature must be diligent, our reflection profound, and our experiments exact. We rarely see these three means combined; and for this reason, creative geniuses are not common.

Sentences are like sharp nails, which force truth upon our memories.

My ideas are my whores.

If there is one realm in which it is essential to be sublime, it is in wickedness. You spit on a petty thief, but you can't deny a kind of respect for the great criminal.

There is no kind of harassment that a man may not inflict on a woman with impunity in civilized societies.

Only passions, great passions can elevate the soul to great things.

The general interest of the masses might take the place of the insight of genius if it were allowed freedom of action.

Good music is very close to primitive language.

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

People praise virtue, but they hate it, they run away from it. It freezes you to death, and in this world you've got to keep your feet warm.

Man will never be free until the last king is strangled with the entrails of the last priest.