Severus Snape: [to Harry] In the past it was often of the Dark Lords pleasure to invade the minds of his victims, creating visions designed to torture them into madness, only extracting the last exquisite ounce of agony, only when he had them beging for death would he finally... kill them. Used properly the power of Occlumency will sheild you from access or influence. In these lessons, I will attempt to penetrate your mind, you will attempt to resist. Perpare yourself!
[Harry sits up. Snape raises wand]
Severus Snape: Legilimens!

Severus Snape: You won't last two seconds if he invades your mind.
Harry Potter: I'm not weak!
Severus Snape: Then prove it!

Dolores Umbridge: [during an inspection] You applied first for the Defense Against the Dark Arts post, is that correct?
Severus Snape: Yes.
Dolores Umbridge: But you were unsuccessful?
Severus Snape: Obviously.

[watches a touching memory between Harry and Sirius] I may vomit.

Professor Snape: Potter! What's your hurry?
[Harry walks up to Snape]
Professor Snape: Congratulations. Your performance in the Black Lake was inspiring. Gillyweed. Am I correct?
Harry: Yes, sir.
Professor Snape: Ingenious.
[Climbs up ladder in his personal store room]
Professor Snape: A rather rare herb, gillyweed. Not something found in your everyday garden.
Professor Snape: [Picks up small vial, then climbs down to floor. He then shows the vial to Harry] Nor is this.
Professor Snape: Know what it is?
Harry: Bubble juice, sir?
Professor Snape: Veritaserum. Three drops of this and You-Know-Who himself would spill his darkest secrets. The use of it on a student is, regrettably, forbidden. However, should you eve steal from my personal stores again, my hand might just slip...
[turns vial sideways, then upright again]
Professor Snape: ...over your morning pumpkin juice.
Harry: I haven't stolen anything.
Professor Snape: Don't... lie... to me! Gillyweed may be innocuous, but boomslang skin? Lacewing flies? You and your little friends are brewing Polyjuice Potion, and believe me, I'm going to find out why!
[Slams door shut in Harry's face]

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.

Professor Snape: Have you any theories as to how Black got in?
Dumbledore: Many, each as unlikely as the next.

Harry: Excuse me, sir. Where's Professor Lupin?
Professor Snape: That's really none of your concern is it, Potter?

Professor Snape: Which one of you can tell me the difference between an animagus and a werewolf?
[Hermione raises her hand]
Professor Snape: No-one? How disappointing.

Well, well, Lupin. Out for a little walk... in the moonlight, are we?

Professor Snape

Professor Snape: [taps the blank Marauder's Map with his wand] Reveal your secrets.
[writing appears on the map]
Professor Snape: Read it.
Harry: "Messrs. Mooney, Wormtail, Padfoot, and Prongs, offer their compliments to Professor Snape and..."
Professor Snape: Go on.
Harry: "... and request that he keep his abnormally large nose out of other people's business."

Professor Snape: You were seen! By no less than seven Muggles! Do you have any idea how serious this is? You have risked the exposure of our world! Not to mention the damage you inflicted on Whomping Willow, that's been on these grounds since before you were born!
Ron: Honestly, Professor Snape, I think it did more damage to us.
Professor Snape: Silence! I assure you that were you in Slytherin and your fate rested with me, the both of you would be on the train home TONIGHT!

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