The person lives most beautifully who does not reflect upon existence

Life is a well of joy; but for those out of whom an upset stomach speaks, which is the father of melancholy, all wells are poisoned.

We believe that we know something about the things themselves when we speak of trees, colors, snow, and flowers; and yet we possess nothing but metaphors for things - metaphors which correspond in no way to the original entities.

I believe only in French culture and consider everything in Europe that calls itself 'culture' a misunderstanding, not to speak of German culture.

Mathematics would certainly have not come into existence if one had known from the beginning that there was in nature no exactly straight line, no actual circle, no absolute magnitude.

If you stare into the Abyss long enough the Abyss stares back at you.

The consequence is that every man comes to know himself solely in terms of his power for defence and attack.