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

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.

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.

ACT as men of thought; THINK as men of action.

For life is tendency, and the essence of a tendency is to develop in the form of a sheaf, creating, by its very growth, divergent directions among which its impetus is divided.

To perceive means to immobilize. To say this is to say that we seize, in the act of perception, something which outruns perception itself.

Intelligence is characterized by a natural incomprehension of life.