Nothing is cheaper and more common than physical bravery. […] Common experience shows how much rarer is moral courage than physical bravery. A thousand men will march to the mouth of the cannon where one man will dare espouse an unpopular cause […] True courage and manhood come from the consciousness of the right attitude toward the world, the faith in one’s own purpose, and the sufficiency of one’s own approval as a justification for one’s own acts.

Clarence Darrow (1857-1938) American lawyer
Resist Not Evil, ch. 16 (1903)