Man is not made for defeat. A man can be destroyed but not defeated.

The Old Man and the Sea
He who fears being conquered is sure of defeat
There are some defeats more triumphant than victories
It is defeat which educates us


On Anger: "For every minute you remain angry, you give up sixty seconds of peace of mind."
On Destiny: "Our destiny exercises its influence over us even when, as yet, we have not learned its nature: it is our future that lays down the law of our today."
Human, All Too Human
On Friendship: "A crowd is not company; and faces are but a gallery of pictures; and talk but a tinkling cymbal, where there is no love."