Professor Snape: That is the second time you have spoken out of turn, Miss Granger. Tell me, are you incapable of restraining yourself, or do you take pride in being an insufferable know-it-all?
Ron: He's got a point, you know.
Ron: [when Harry and Hermione reappear] How did you get there? I... I was talking to you there! And now you're there!
Hermione: What's he talking about Harry?
Harry: I dunno. Honestly Ron, how can people be in two places at once
[Hermione looks at Ron's broken leg, and they flirt by mimicking Malfoy and Pansy Parkinson]
Hermione: Ow! That looks really painful.
Ron: It's sorta painful. They uh, they might... chop it.
Hermione: I'm sure Madame Pomfrey will fix it in a heartbeat.
Ron: It's too late, it's ruined. It'll have to be chopped off.
Harry: He's free. We did it.
Dumbledore: Did what? Good night.
[outside the shrieking shack to Ron and Hermione] Well, well. Look who's here - you two shopping for your new dream home? Bit grand for you, isn't it, Weasel-Bee? Don't your family all sleep in... one room?Malfoy
[to Buckbeak] Come on Buckbeak! Come and get the nice dead ferret!Hermione
Poor Professor Lupin's having a really tough night.Harry
Harry: Professor, why do the dementors affect me so? More than anyone else, I mean?
Professor Lupin: Listen, dementors are among the foulest creatures to walk this earth. They feed on every good feeling, every happy memory until a person is left with nothing but his worst experiences. The dementors affect you more than others because there are true horrors in your past, horrors your classmates can scarcely imagine. You are not weak, Harry. You have nothing to be ashamed of.
Harry: I'm scared, Professor.
Professor Lupin: Well, I'd consider you a fool if you weren't.
Neville, you're supposed to stroke it!Ron
You know the very first time I saw you, Harry, I recognized you immediately. Not by your scar, by your eyes. They're your mother, Lily's. Yes, oh yes. I knew her. Your mother was there for me at a time when no one else was. Not only was she a singularly gifted witch, she was also an uncommonly kind woman. She had a way of seeing the beauty in others even more perhaps. Most especially when that person couldn't see it in themselves. Then your father, James on the other hand, he uh ha, he had a certain shall we say talent for trouble. The talent, rumor has it, he passed onto you. You are more like them than you know, Harry. In time you'll come to see just how much.Professor Lupin
Dumbledore: A word of caution: dementors are vicious creatures. They will not distinguish between the one they hunt and the one who gets in their way. Therefore I must warn each and every one of you to give them no reason to harm you. It's not in the nature of a dementor to be forgiving. But you know happiness can be found even in the darkest of times, when one only remembers to turn on the light.
Professor Snape: Have you any theories as to how Black got in?
Dumbledore: Many, each as unlikely as the next.