I mean that you always know what results will come from one or another of your actions; but in a strange way you want to do one thing and get the result that could only come from another

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.

Everything we do consciously remains for us.

Effort plus motive equals result.

There is no possibility of remembering what has been found and understood, and later repeating it to oneself. It disappears as a dream disappears. Perhaps it is all nothing but a dream.

In all living nature (and perhaps also in that which we consider as dead) love is the motive force which drives the creative activity in the most diverse directions.

There is no tyranny more ferocious than the tyranny of morality. Everything is sacrificed to it.