Probability but no truth, facility but no freedom--it is owing to these two fruits that the tree of knowledge cannot be confused with the tree of life.

The moral earth, too, is round! The moral earth, too, has its antipodes! The antipodes, too, have their right to exist! There is still another world to be discovered--and more than one! Set sail, you philosophers!

You I advise not to work, but to fight. You I advise not to peace, but to victory. Let your work be a fight, let your peace be a victory!

Whoever has character also has his typical experience, which returns over and over again.

If a man wishes to become a hero, then the serpent must first become a dragon: otherwise he lacks his proper enemy.

There are no moral phenomena at all, but only a moral interpretation of phenomena.

Enjoy life. This is not a dress rehearsal.