Moral sensibilities are nowadays at such cross-purposes that to one man a morality is proved by its utility, while to another its utility refutes it.

The secret of realizing the greatest fruitfulness and the greatest enjoyment of existence is: to live dangerously! Build your cities on the slopes of Vesuvius! Send your ships out into uncharted seas! Live in conflict with your equals and with yourselves! Be robbers and ravagers as soon as you ca not be rulers and owners, you men of knowledge! The time will soon past when you could be content to live concealed int he woods like timid deer!

In art the end does not sanctify the means: but sacred means employed here can sanctify the end.

Ye shall be those whose eyes ever seek for an enemy - for YOUR enemy. And with some of you there is hatred at first sight.

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

Astrology presupposes that the heavenly bodies are regulated in their movements in harmony with the destiny of mortals: the moral man presupposes that that which concerns himself most nearly must also be the heart and soul of things.

What can everyone do? Praise and blame. This is human virtue, this is human madness.