The spiritualization of sensuality is called love: it is a great triumph over Christianity.

Kindliness, friendliness, the courtesy of the heart, are ever-flowing streams of non egoistic impulses, and have given far more powerful assistance to culture than even those much more famous demonstrations which are called pity, mercy, and self-sacrifice.

Pharisaism is not a degeneration in a good man: a large portion of it is rather the condition of all being-good.

Whoever, at any time, has undertaken to build a new heaven has found the strength for it in his own hell.

One must have all the virtues to sleep well. Shall I bear false witness? Shall I commit adultery? Shall I covet my neighbor's maid? All that would go ill with good sleep.

Thinking has to be learned in the way dancing has to be learned.

The philosopher caught in the nets of language.