To exist is to change, to change is to mature, to mature is to go on creating oneself endlessly.

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

Genius is that which forces the inertia of humanity to learn.

The major task of the twentieth century will be to explore the unconscious, to investigate the subsoil of the mind.

Is it astonishing that, like children trying to catch smoke by closing their hands, philosophers so often see the object they would grasp fly before them?

Only those ideas that are least truly ours can be adequately expressed in words.

In just the same way the thousands of successive positions of a runner are contracted into one sole symbolic attitude, which our eye perceives, which art reproduces, and which becomes for everyone the image of a man who runs.