Below are a few quotes involving Maggie Smith - click the title to view the complete list. If you think their finest moments are missing from the full list, just click "submit something" to submit something new.
Orderly: My wife is from Mumbai.
Muriel: Well don't blame me, you married her!
Evelyn: Nothing here has worked out quite as I expected.
Muriel: Most things don't. But sometimes what happens instead is the good stuff.
Flitwick: You do realize we can't keep out You-Know-Who indefinitely.
Minerva McGonagall: That doesn't mean we can't delay him. And his name is Voldemort, so you might as well use it, he's going to try and kill you either way.
Minerva McGonagall: I've always wanted to use that spell!
Filch: Students in the corridor! Students out of bed!
Professor Minerva McGonagall: They are supposed to be out of bed, you blithering idiot.
Professor McGonagall: Now, Mr. Weasley, put your right hand on my waist.
Professor McGonagall: We never use Transfiguration on a student as punishment! Didn't Dumbledore tell you?
Professor 'Mad-Eye' Moody: He might've mentioned it.
Professor McGonagall: Professor Moody! What are you doing?
Professor 'Mad-Eye' Moody: Teaching.
Professor McGonagall: Is... is that a student?
Professor 'Mad-Eye' Moody: Technically it's a ferret.
Professor McGonagall: Mr. Potter, are you and Miss Patil ready?
Harry Potter: Ready? For what?
Professor McGonagall: To dance! It's traditional for the three... well, in this case, four champions to begin the dance. Surely I told you that?
Harry Potter: No.
Professor McGonagall: Oh... well, now you know.
Professor McGonagall: Potter is a boy! Not a piece of meat!