There is something in us that is wiser than our head.

There is no absurdity so palpable but that it may be firmly planted in the human head if you only begin to inculcate it before the age of five, by constantly repeating it with an air of great solemnity.

A man can be himself only so long as he is alone.

To desire immortality is to desire the eternal perpetuation of a great mistake

A man who has not enough originality to think out a new title for his book will be much less capable of giving it new contents.

Monotheistic religions alone furnish the spectacle of religious wars, religious persecutions, heretical tribunals, that breaking of idols and destruction of images of the gods, that razing of Indian temples and Egyptian colossi, which had looked on the sun 3,000 years: just because a jealous god had said, Thou shalt make no graven image.

There is no vice of which a man can be guilty, no meanness, no shabbiness, no unkindness, which excites so much indignation among his contemporaries, friends and neighbours, as his success. This is the one unpardonable crime, which reason cannot defend, nor humility mitigate.