Aren't all beautiful things made by renunciation?

-Degas, (Hilaire Germain) Edgar
Quoted in P Lafond Degas (1918^9).

Courage is a moral quality; it is not a chance gift of nature, like an aptitude for games. It is a cold choice between two alternatives; the fixed resolve not to quit, an act of renunciation that must be made not once but many times by the power of the will.

-Moran, Richard John McMoranWilson, 2nd Baron
  The Anatomy of Courage.