The perfect woman is a higher type of humanity than the perfect man, and also something much rarer. The natural history of animals furnishes grounds in support of this theory.

Philosophical systems are wholly true for their founders only.

In constructing concepts, we overlook the fact that no two things are the same. There is no such thing as the concept of a leaf, only billions and billions of leaves.

Under conditions of peace the warlike man attacks himself.

He who fights with monsters might take care lest he thereby become a monster. Is not life a hundred times too short for us to bore ourselves?

Truth as Circe. - Error has transformed animals into men; is truth perhaps capable of changing man back into an animal?

There is nothing for which men ask to be paid dearer than for humiliation.