Even truthfulness is but one means to knowledge, a ladder--but not the ladder.

When one does away with oneself one does the most estimable thing possible: one thereby almost deserves to live.

Wit is the epitaph of an emotion.

Whereas the man of action binds his life to reason and its concepts so that he will not be swept away and lost, the scientific investigator builds his hut right next to the tower of science so that he will be able to work on it and to find shelter for himself beneath those bulwarks which presently exist.

One has to pay dearly for immortality; one has to die several times while one is still alive.

It is nobler to declare oneself wrong than to insist on being right --especially when one is right.

Loneliness is one thing, solitude another.