Moral codes adjust themselves to environmental conditions.

History reports that the men who can manage men manage the men who can manage only things, and the men who can manage money manage all.

Every science begins as philosophy and ends as art; it arises in hypothesis and flows into achievement.

There have been only 268 of the past 3,421 years free of war.

I feel for all faiths the warm sympathy of one who has come to learn that even the trust in reason is a precarious faith, and that we are all fragments of darkness groping for the sun. I know no more about the ultimates than the simplest urchin in the streets.

Civilizaton is the interval between Ice Ages.

Cultivate your garden… Do not depend upon teachers to educate you … follow your own bent, pursue your curiosity bravely, express yourself, make your own harmony… In the end, education, like happiness, is individual, and must come to us from life and from ourselves. There is no way; each pilgrim must make his own path. "Happiness," said Chamfort, "is not easily won; it is hard to find it in ourselves, and impossible to find it elsewhere.