To drive out the darkness, bring in the light.

An absolute can only be given in an intuition, while all the rest has to do with analysis.

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.

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

We regard intelligence as man's main characteristic and we know that there is no superiority which intelligence cannot confer on us, no inferiority for which it cannot compensate.

In reality, the past is preserved by itself automatically.

I cannot escape the objection that there is no state of mind, however simple, that does not change every moment