There are a examples everywhere of such everyday courage. Flipping through an old Sun magazine last night, I ran across an essay about the kind of emotional fuel such work requires.
From "They Always Call You 'Miss'" by Alison Clement:
"There's more to waiting tables than you might think. It takes courage, for one thing. You walk up to a table, and everyone turns to look at you, as if you're about to deliver the opening line of a play....You have to act as if you know what you're doing and everything is going according to a plan....You have to remember: Gin and tonic to table 8; man at 12 is late for a meeting; nut allergy on 5. You have to remember it all and not get overwhelmed."
If I start to feel down on human nature, I think about the ordinary things that people muster the courage to do every day.