A heart full of courage and cheerfulness needs a little danger from time to time, or the world gets unbearable.

I love him whose soul is deep even in the wounding, and may succumb through a small matter: thus goeth he willingly over the bridge.

Virtues are dangerous as vices insofar as they are allowed to rule over one as authorities and not as qualities one develops oneself.

The happiness of man is: I will. The happiness of woman is: he wills.

I want to know whether you are a person devoted to creating or to exchanging in some respect or other: as a creator you belong tothe free, as an exchanger you are their slave and instrument.

Man is the cruelest animal. At tragedies, bullfights, and crucifixions he has so far felt best on earth; and when he invented hell for himself, behold, that was his very heaven.

Everything becomes and recurs eternally - escape is impossible!