In the mountains of truth, you never climb in vain.

We pay dearly for immortality: we die for it more than once during our lifetimes.

When a man reaches his maturity in understanding and in years, the feeling comes over him that his father was wrong to beget him.

Every word is a prejudice.

Every living body continuously eliminates feces, it rejects what is not serviceable to the assimilating organism: what man despises, what arouses his disgust, what he calls evil, are excrements.

All human life is sunk deep in untruth; the individual cannot pull it out of this well without growing profoundly annoyed with his entire past, without finding his present motives (like honor) senseless, and without opposing scorn and disdain to the passions that urge one on to the future and to the happiness 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.