The greatest of follies is to sacrifice health for any other kind of happiness.

Pride is generally censured and decried, but mainly by those who have nothing to be proud of.

Sexual passion is the cause of war and the end of peace, the basis of what is serious... and consequently the concentration of all desire

As the biggest library if it is in disorder is not as useful as a small but well-arranged one, so you may accumulate a vast amount of knowledge but it will be of far less value than a much smaller amount if you have not thought it over for yourself.

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.

Life is a constant process of dying.

Just remember, once you're over the hill you begin to pick up speed.