They don’t need walls and water to keep the prisoners in, not when they’re trapped inside their own heads, incapable of a single cheerful thought. Most go mad within weeks - Lupin

Don't be silly, Dawlish. I'm sure you are an excellent Auror, I seem to remember you achieved 'Outstanding' in all your N.E.W.T.s, but if you attempt to — er — 'bring me in' by force, I will have to hurt you.

Ron, you know full well Harry and I were brought up by Muggles!” said Hermione. “We didn’t hear stories like that when we were little, we heard ‘Snow White and the Seven Dwarfs’ and ‘Cinderella’ —” “What’s that, an illness?” asked Ron.

I forgot Dumbledore trashed Hogwarts, refused to resign and ran off to the forest to make speeches to angry trolls.

Do you—do you think I want to—do you think I give a—I DON'T CARE WHAT YOU HAVE TO SAY!" Harry roared. "You will," said Dumbledore sadly. "Because you are not nearly as mad at me as you ought to be. If you are to attack me, as I know you are close to doing, I would like to have thoroughly earned it.

With another shock of excitement, Harry saw Sirius give James the thumbs-up. Sirius was lounging in his chair at his ease, tilting it back on two legs. He was very good-looking, his dark hair fell into his eyes with a sort of casual elegance neither James's nor Harry's could ever have achieved, and a girl sitting behind him was eyeing him hopefully, though he didn't seem to have noticed.

Harry was just thinking that all he needed was for Dumbledore's pet bird to die while he was all alone in the office with it, when the bird burst into flames.