“You've got to be smart enough to write and stupid enough not to think about all the things that might go wrong.”

“Just like when there's a time that a smart person knows enough is enough, there's a time when you know you've got to fight.”

“The thing about growing up with Fred and George," said Ginny thoughtfully, "is that you sort of start thinking anything's possible if you've got enough nerve.”

“Cos if it's encyclopedias we've got enough, like, information... and if it's God, you've got the wrong house.”

“I think," Nick snarled, "that the stupid bastard isn't smart enough to win a poker hand with a deck of marked cards.”

“But you can't go around changing your definition of right and wrong (or smart and stupid) just because doing the wrong thing happens to be really convenient. Sometimes it isn't easy to be sane, smart, and responsible. Sometimes it sucks. Sucks wang. Camel wang. But that doesn't turn wrong into right or stupid into smart.”