Life does not proceed by the association and addition of elements, but by dissociation and division.

Spirit borrows from matter the perceptions on which it feeds and restores them to matter in the form of movements which it has stamped with its own freedom.

There is no greater joy than that of feeling oneself a creator. The triumph of life is expressed by creation.

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

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

Our laughter is always the laughter of a group.

It is the very essence of intelligence to coordinate means with a view to a remote end, and to undertake what it does not feel absolutely sure of carrying out.