“"I asked Professor Quirrell why he'd laughed," the boy said evenly, "after he awarded Hermione those hundred points. And Professor Quirrell said, these aren't his exact words, but it's pretty much what he said, that he'd found it tremendously amusing that the great and good Albus Dumbledore had been sitting there doing nothing as this poor innocent girl begged for help, while he had been the one to defend her. And he told me then that by the time good and moral people were done tying themselves up in knots, what they usually did was nothing; or, if they did act, you could hardly tell them apart from the people called bad. Whereas he could help innocent girls any time he felt like it, because he wasn't a good person. And that I ought to remember that, any time I considered growing up to be good."” --hpmor