All great artists and thinkers are great workers.

When anyone apologizes to us he has to do it very expertly: otherwise we might easily come to see ourselves as the guilty party and experience unpleasant feelings.

Whoever does not know how to find the way to his ideal lives more frivolously and impudently than the man without an ideal.

[Heraclitus' language] dispenses with lightness and artificial decoration, foremost out of disgust for humanity and out of [his own] defiant feeling.

What, if some day or night a demon were to steal after you into your loneliest loneliness and say to you: 'This life as you now live it and have lived it, you will have to live once more and innumerable times more' ... Would you not throw yourself down and gnash your teeth and curse the demon who spoke thus? Or have you once experienced a tremendous moment when you would have answered him: 'You are a god and never have I heard anything more divine.

Whoever deliberately attempts to insure confidentiality with another person is usually in doubt as to whether he inspires that person's confidence in him. One who is sure that he inspires confidence attaches little importance to confidentiality.

But this word will I say to my enemies: What is all manslaughter in comparison with what you have done to me!