The idea of the future, pregnant with an infinity of possibilities, is thus more fruitful than the future itself, and this is why we find more charm in hope than in possession, in dreams than in reality.

Intuition is a method of feeling one's way intellectually into the inner heart of a thing to locate what is unique and inexpressible in it.

Europe is overpopulated, the world will soon be in the same condition, and if the self-reproduction of man is not rationalized... we shall have war.

There is nothing in philosophy which could not be said in everyday language.

The present contains nothing more than the past, and what is found in the effect was already in the cause.

The emotion felt by a man in the presence of nature certainly counts for something in the origin of religions.

The universe... is a machine for the making of gods.