If an architect wants to strengthen a decrepit arch, he increases the load laid upon it, for thereby the parts are joined more firmly together.

After coming into contact with a religious man I always feel I must wash my hands.

If you have an enemy, do not requite him evil with good, for that would put him to shame. Rather prove that he did you some good.

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.

I love him who liveth in order to know, and seeketh to know in order that the Superman may hereafter live. Thus seeketh he his own down-going.

Above all, there is no exception to this rule: that the idea of political superiority always resolves itself into the idea of psychological superiority.

Jesus died too soon. If he had lived to my age he would have repudiated his doctrine.