I saw a patient of mine recently whose appearance in my office always makes me smile. He's challenging—not because he's a difficult person (quite the opposite), but because he has so many serious medical problems about which I can do so little. Why, then, does seeing him so consistently lighten my mood? Because it reminds me that for all the terrible things that go on—the abuse, the discrimination, the injustice, the downright nastiness—good still exists in the world. Because, you see, he's a hero.