Thinking evil is making evil.

Without the errors involved in the assumptions of ethics, man would have remained an animal. Thus has he taken himself as something higher and imposed rigid laws upon himself.

I fear that, with our current veneration for the natural and the real, we have arrived at the opposite pole to all idealism, and have landed in the region of the waxworks.

The most unequivocal sign of contempt for man is to regard everybody merely as a means to one's own ends, or of no account whatever.

Science and art have that in common that everyday things seem to them new and attractive.

I assess the power of a will by how much resistance, pain, torture it endures and knows how to turn to its advantage.

Morality is neither rational nor absolute nor natural. World has known many moral systems, each of which advances claims universality; all moral systems are therefore particular, serving a specific purpose for their propagators or creators, and enforcing a certain regime that disciplines human beings for social life by narrowing our perspectives and limiting our horizons.