It quite often happens that the old man is subject to the delusion of a great moral renewal and rebirth, and from this experience he passes judgments on the work and course of his life, as if he had only now become clear-sighted; and yet the inspiration behind this feeling of well-being and these confident judgements is not wisdom, but weariness .

Even in the lust of knowledge I feel only my will's delight in begetting and becoming; and if there be innocence in my knowledge it is because my procreative will is in it.

I can tell by my own reaction to it that this book is harmful." But let him only wait and perhaps one day he will admit to himself that this same book has done him a great service by bringing out the hidden sickness of his heart and making it visible.— Altered opinions do not alter a man’s character (or do so very little); but they do illuminate individual aspects of the constellation of his personality which with a different constellation of opinions had hitherto remained dark and unrecognizable.

Wit is the epitaph of an emotion.

A belief, however necessary it may be for the preservation of a species, has nothing to do with truth. The falseness of a judgment is not for us necessarily an objection to a judgment. The question is to what extent it is life-promoting, life-preserving, species preserving, perhaps even species cultivating. To recognize untruth as a condition of life--that certainly means resisting accustomed value feelings in a dangerous way; and a philosophy that risks this would by that token alone place itself beyond good and evil.

One is proud to worship when he cannot be an idol.

...the only psychologist from whom I have anything to learn.