Harry: I just apparated, didn't I?
Dumbledore: Yes, and quite successfully, too. Most people tend to vomit the first time.
Harry (looking rather queasy): I can't imagine why.

Snape: Put it down, Bella. We musn't touch what isn't ours.

Harry: So what's he [Malfoy] doing in Bourgin and Burke's?
Ron: It's a creepy shoppe. He's a creepy bloke.

Hermione: Let me see your book, Harry.
Harry: No, you can't.
Hermione: Why not?
Harry: The binding is fragile.

I'll stop there because I have way too many favorites from this movie.