The belief in a supernatural source of evil is not necessary; men alone are quite capable of every wickedness.

The mind of man is capable of anything--because everything is in it, all the past as well as all the future. What was there after all? Joy, fear, sorrow, devotion, valor, rage--who can tell?--but truth--truth stripped of its cloak of time.

Let them think what they liked, but I didn't mean to drown myself. I meant to swim till I sank -- but that's not the same thing.

A modern fleet of ships does not so much make use of the sea as exploit a highway.

Mathematics commands all my respect, but I have no use for engines.

Art is long and life is short, and success is very far off.

He struggled with himself, too. I saw it -- I heard it. I saw the inconceivable mystery of a soul that knew no restraint, no faith, and no fear, yet struggling blindly with itself.