Not necessity, not desire - no, the love of power is the demon of men. Let them have everything - health, food, a place to live, entertainment - they are and remain unhappy and low-spirited: for the demon waits and waits and will be satisfied.

In song and dance, man forgets how to walk and speak and is on the way into flying into the air, dancing... his very gestures express enchantment.

Partial knowledge is more triumphant than complete knowledge; it takes things to be simpler than they are, and so makes its theory more popular and convincing.

No more fiction, for now we calculate; but that we may calculate, we had to make fiction first.

So far no one had had enough courage and intelligence to reveal me to my dear Germans. My problems are new, my psychological horizon frighteningly comprehensive, my language bold and clear; there may well be no books written in German which are richer in ideas and more independent than mine.

One must give value to their existence by behaving as if ones very existence were a work of art.

Laughter means: taking a mischievous delight in someone else's uneasiness, but with a good conscience.