One must have all the virtues to sleep well. Shall I bear false witness? Shall I commit adultery? Shall I covet my neighbor's maid? All that would go ill with good sleep.

I teach you beyond Man (superman). Man is something that shall be surpassed. What have you done to surpass him?

...lust is only a sweet poison for the weakling, but for those who will with a lion's heart it is the reverently reserved wine of wines.

Truth is the kind of error without which a certain species of life could not live. The value for life is ultimately decisive.

The hour when you say, "What does my happiness matter? It is poverty and filth, and a wretched complacency. Yet my happiness should justify existence itself!

Conversation with a friend will only bear good fruit of knowledge when both think only of the matter under consideration and forget that they are friends.

In his lonely solitude, the solitary man feeds upon himself; in the thronging multitude, the many feed upon him. Now choose.