Psychology is sometimes called a new science. This is quite wrong. Psychology is, perhaps, the oldest science, and, unfortunately, in its most essential features a forgotten science.

Everything we do consciously remains for us.

The problem of Eternity, of which the face of the Sphinx speaks, takes us into the realm of the impossible. Even the problem of Time is simple in comparison with the problem of Eternity.

a man can be given only what he can use; and he can use only that for which he has sacrificed something

Attaining consciousness is connected with the gradual liberation from mechanicalness, for man is fully and completely under mechanical laws.

One cannot keep all old views and opinions and acquire new ones.

Psychology is sometimes called a new science. This is quite wrong. Psychology is, perhaps, the oldest science, and, unfortunately, in its most essential features a forgotten science.