Never feel remorse for what you have thought about your wife; she has thought much worse things about you.

Science has made us gods even before we are worthy of being men.

Greatness, in order to gain recognition, must all too often consent to ape greatness.

Renown? I've already got more of it than those I respect, and will never have as much as those for whom I feel contempt.

Whether man is disposed to yield to nature or to oppose her, he cannot do without a correct understanding of her language

The books one has written in the past have two surprises in store: one couldn't write them again, and wouldn't want to.

In our ideals we unwittingly reveal our vices.