The wheel and the brake have different duties, but also one in common: to hurt one another.

Moral sensibilities are nowadays at such cross-purposes that to one man a morality is proved by its utility, while to another its utility refutes it.

The earth has become small, and on it hops the last man, who makes everything small. His race can no more be exterminated than the flea can be. The last man lives the longest.

Since Copernicus, man seems to have got himself on an inclined plane-now he is slipping faster and faster away from the center into-what? into nothingness? into a 'penetrating sense of his nothingness?' ... all science, natural as well as unnatural-which is what I call the self-critique of knowledge-has at present the object of dissuading man from his former respect for himself, as if this had been but a piece of bizarre conceit.

The charm of knowledge would be small indeed, were it not that there is so much shame to be overcome on the way to it.

All contempt for the sexual life, all denigration under the concept 'impure" is the essential crime against Life- against the Holy Spirit of Life".

Some men have sighed over the abduction of their wives, but many more have sighed because no one wanted to abduct theirs.