Intelligence is characterized by a natural incomprehension of life.

To drive out the darkness, bring in the light.

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

Action on the move creates its own route, creates to a very great extent the conditions under which it is to be fulfilled and thus baffles all calculation.

When we make the cerebral state the beginning of an action, and in no sense the condition of a perception, we place the perceived images of things outside the image of our body, and thus replace perception within the things themselves.

It seems that laughter needs an echo.

It is with our entire past ... that we desire, will and act ... from this survival of the past it follows that consciousness cannot go through the same state twice. The circumstances may still be the same, but they will act no longer on the same person ... that is why our duration is irreversible.