Nature knows no indecencies; man invents them.

I am against nature. I don't dig nature at all. I think nature is very unnatural. I think the truly natural things are dreams, which nature can't touch with decay.

A moral system valid for all is basically immoral.

We are so fond of being out among Nature, because it has no opinions about us.

Art is not merely an imitation of the reality of nature, but in truth a metaphysical supplement to the reality of nature, placed alongside thereof for its conquest.

What is a law of nature as such for us? We are not acquainted with it in itself, but only with its effects, which means in its relation to other laws of nature - which, in turn, are known to us only as sums of relations.