You don't know what I'm capable of, you don't know what I've done!

... you could claim that anything's real if the only basis for believing in it is that nobody's proved it doesn't exist!

According to Nietzche," said a sharp new voice, making them all jump, "philosophy is the biography of the philosopher.

If there is one thing Voldemort cannot understand, it is love.

Professor Trelawney: "Everything went pitch-black and the next thing I knew I was being hurled headfirst out of the room!" Harry Potter: "And you didn’t see that coming?" Professor Trelawney: "No, as I say it was pitch — ” [Glares at Harry angrily]

Warrington’s aim’s so pathetic I’d be more worried if he was aiming for the person next to me.

Yes, it has made me happier. Finishing them has made me happier. Before I wrote the Potter books, I'd never finished a novel. I came close to finishing two.