The way to transmute your iron duty into gold in everyone's eyes is this: always deliver more than you promise.

I want to teach men the sense of their existence, which is the Superman, the lightning out of the dark cloud man.

Interest in Education will acquire great strength only from the moment when belief in a God and His care is renounced, just as the art of healing could only flourish when the belief in miracle cures ceased.

Every achievement, every step forward in knowledge, is the consequence of courage, of toughness towards oneself, of sincerity to oneself

The refinement of morality increases together with the refinement of fear. Today the fear of disagreeable feelings in other people is almost the strongest of our own disagreeable feelings.

Insects sting, not from malice, but because they want to live. It is the same with critics; they desire our blood not our pain.

What does not destroy me, makes me stronger.