Certitude drives people mad.

Few serve truth in truth because only few have the pure will to be just, and of those again very few have the strength to be just.

Freedom of opinion is like health; both are individual, and no good general conception can be set up of either of them.

Every living body continuously eliminates feces, it rejects what is not serviceable to the assimilating organism: what man despises, what arouses his disgust, what he calls evil, are excrements.

After coming into contact with a religious man I always feel I must wash my hands.

Enjoying praise is in some people merely a civility of the heart--and just the opposite of a vanity of the spirit.

The question of place and climate is most closely related to the question of nutrition. Nobody is free to live everywhere; and whoever has to solve great problems that challenge all his strength actually has a very restricted choice in this matter. The influence of climate on our metabolism, its retardation, its acceleration, goes so far that a mistaken choice of place and climate can not only estrange a man from his task but can actually keep it from him: he never gets to see it.