Demon: What an excellent day for an exorcism. Father Damien Karras: You would like that? Demon: Intensely. Father Damien Karras: But wouldn't that drive you out of Regan? Demon: It would bring us together. Father Damien Karras: You and Regan? Demon: ...
Demon: I'm not Regan. Father Damien Karras: Well, then let's introduce ourselves. I'm Damien Karras. Demon: And I'm the Devil. Now kindly undo these straps. Father Damien Karras: If you're the Devil, why not make the straps disappear? Demon: That's m...
[repeated lines] Father Merrin, Father Damien Karras: The Power of Christ compels you!
Demon: Your mother sucks cocks in Hell, Karras, you faithless slime.
Father Merrin: Especially important is the warning to avoid conversations with the demon. We may ask what is relevant but anything beyond that is dangerous. He is a liar. The demon is a liar. He will lie to confuse us. But he will also mix lies with ...
Demon: Stick your cock up her ass, you motherfucking worthless cocksucker.
Burke Dennings: [to Karl] Cunting Hun! Bloody damn butchering Nazi pig!
Psychiatrist: Is there someone inside you? Regan MacNeil: Sometimes. Psychiatrist: Who is it? Regan MacNeil: I don't know. Psychiatrist: Is it Captain Howdy? Regan MacNeil: I don't know. Psychiatrist: If I ask him to tell me, will you let him answer?...
Demon: Mirabile dictu, don't you agree? Father Damien Karras: You speak Latin? Demon: Ego te absolvo. Father Damien Karras: Quod nomen mihi est? Demon: Bon Jour. Father Damien Karras: Quod nomen mihi est? Demon: La plume de ma tante.
Father Damien Karras: Where is Regan? Demon: In here. With us.
Regan MacNeil: You're going to die up there.
Demon: Do you know what she did, your cunting daughter?
Father Damien Karras: There are no experts. You probably know as much about possession than most priests. Look, your daughter doesn't say she's a demon. She says she's the devil himself. And if you've seen as many psychotics as I have, you'd know it'...
Chris MacNeil: [as the Ouija planchette pulls away] You really don't want me to play, huh? Regan MacNeil: No, I do. Captain Howdy said no. Chris MacNeil: Captain who? Regan MacNeil: Captain Howdy. Chris MacNeil: Who's Captain Howdy? Regan MacNeil: Yo...
Father Damien Karras: I think it might be helpful if I gave you some background on the different personalities Regan has manifested. So far, I'd say there seem to be three. She's convinced... Father Merrin: There is only one.
Father Damien Karras: Why her? Why this girl? Father Merrin: I think the point is to make us despair. To see ourselves as... animal and ugly. To make us reject the possibility that God could love us.
Karras' Mother: [to Karras] Why you do this to me, Dimmy?
Chris MacNeil: What are you doing here? Regan MacNeil: My bed was shaking. I can't get to sleep.