Nietzsche says;

You need chaos in your soul to give birth to a dancing star.

What does not kill me, makes me stronger.

One must pay dearly for immortality; one has to die several times while still alive.

There are no facts, only interpretations.

Insanity in individuals is something rare – but in groups, parties, nations and epochs, it is the rule.

You great star, what would your happiness be had you not those for whom you shine?

In everything one thing is impossible: rationality.

Is life not a thousand times too short for us to bore ourselves?

To forget one's purpose is the commonest form of stupidity.

Morality is herd instinct in the individual.