He divines remedies against injuries; he knows how to turn serious accidents to his own advantage; whatever does not kill him makes him stronger

To see others suffer does one good, to make others suffer even more: this is a hard saying but an ancient, mighty, human, all-too-human principle [....] Without cruelty there is no festival.

The value of many men and books rests solely on their faculty for compelling all to seek out the most hidden and intimate things.

Anti-theses.- The most senile thing ever thought about man is contained in the celebrated saying 'the ego is always hateful'; the most childish is the even more celebrated 'love thy neighbor as thyself'. - In the former, knowledge of human nature has ceased, in the latter it has not yet even begun.

He who has a why to live can bear almost any how.

Memory says, 'I did that.' Pride replies, 'I could not have done that.' Eventually, memory yields.

And those who were seen dancing were thought to be insane by those who could not hear the music.