So after E, it’s A for ‘Acceptable,’ and that’s the last pass grade, isn’t it?” “Yep,” said Fred, dunking an entire roll in his soup, transferring it to his mouth, and swallowing it whole. “Then you get P for ‘Poor’ ” — Ron raised both his arms in mock celebration — “and D for ‘Dreadful.’ ” “And then T,” George reminded him. “T?” asked Hermione, looking appalled. “Even lower than a D? What on earth does that stand for?” “ ‘Troll,’ ” said George promptly.

Rock bottom can be a solid foundation from which you can rebuild your life on.

I know what you are known as . . . but to me, you will always be Tom Riddle. It is one of the irritating things about old teachers. I am afraid that they never quite forget their charges’ youthful beginnings.

Whether you come back by page or by the big screen, Hogwarts will always be there to welcome you home.

Harry is the best hope we have. Trust him.

Never trust anything that can think for itself if you can't see where it keeps its brain.

If you are writing children's books, you need to be a ruthless killer.