The quote continues: "Well, you can say that’s waggery, but I suggest that every time you find you’re drifting into self-pity—I don’t care what the cause, your child could be dying of cancer, self-pity is not going to improve the situation—just give yourself one of those cards. It’s a ridiculous way to behave and when you avoid it you get a great advantage over everybody else, almost everybody else, because self-pity is a standard condition and yet you can train yourself out of it."

It's not lacking empathy. At the end of the day the only thing you can remain control of is your attitude. Are you going to let unfortunate circumstances continue to ruin your life or are you going to do something about it? Charlie developed this thinking when he son died of leukemia at age 9. He was devastated, but he decided it wasn't going to be a drag on the rest of his life.