The characteristic of genuine heroism is its persistency. All men have wandering impulses, fits and starts of generosity. But when you have resolved to be great, abide by yourself, and do not weakly try to reconcile yourself with the world. The heroic cannot be the common, nor the common the heroic.
Most people aren't appreciated enough, and the bravest things we do in our lives are usually known only to ourselves. No one throws ticker tape on the man who chose to be faithful to his wife, on the lawyer who didn't take the drug money, or the daughter who held her tongue again and again. All this anonymous heroism.