"The most dangerous thing one can do is to be right when the world is wrong."

"When one has finished building one's house, one suddenly realizes that in the process one has learned something that one really ought to have known before beginning."

"I assess the value of a man by how much he can endure without falling apart."

"In truth, man is a polluted river. One must be a sea to receive a polluted river without becoming defiled. I bring you the Superman! He is that sea; in him your great contempt can be submerged."

"Man's maturity: to have reacquired the seriousness that one had as a child at play."