Logic, too, also rests on assumptions that do not correspond to anything in the real world, e.g., on the assumption that there areequal things, that the same thing is identical at different points in time: but this science arose as a result of the opposite belief (that such things actually exist in the real world). And it is the same with mathematics, which would certainly never have arisen if it had been understood from the beginning that there is no such thing in nature as a perfectly straight line, a true circle, and absolute measure.

I know my fate. One day my name will be tied to the memory of something monstrous - a crisis without equal on earth.... I am no man, I am dynamite!

Convictions are prisons.

It is the music in our conscience, the dance in our spirit, to which Puritan litanies, moral sermons, and goody goodness won’t chime.

At present I am light, now I fly, now I see myself below me, now a god dances through me.

Asceticism is the right way of thinking for those who have to extirpate their sensual drives because they are ravening beasts of prey. But only for those!

The doer alone learneth.