“Action springs not from thought, but from a readiness for responsibility.”
“When Christ calls a man, he bids him come and die.”
“An absolute can only be given in an intuition, while all the rest is analysis.”
“The present contains nothing more than the past, and what is found in the effect was already in the cause.”
“The eye sees only what the mind is prepared to comprehend.”
“To exist is to change, to change is to mature, to mature is to go on creating oneself endlessly.”
“No, no, you're not thinking; you're just being logical.”
“How wonderful that we have met with a paradox. Now we have some hope of making progress.”
“Anyone who is not shocked by quantum theory has not understood it.”
“The opposite of a correct statement is a false statement. But the opposite of a profound truth may well be another profound truth.”
“Never express yourself more clearly than you are able to think.”
“An expert is a man who has made all the mistakes which can be made in a very narrow field.”
“Art is not a mirror held up to reality but a hammer with which to shape it.”
“Grub first, then ethics.”
“In the dark times will there also be singing? Yes, there will also be singing. About the dark times.”
“Because things are the way they are, things will not stay the way they are.”
“Who is the greater criminal: he who robs a bank or he who founds one?”
“Unhappy the land that is in need of heroes.”
“I don't need an alarm clock. My ideas wake me.”