Jason Miller credited as playing...
Father Karras
- Demon: What an excellent day for an exorcism.
- Father Karras: You would like that?
- Demon: Intensely.
- Father Karras: But wouldn't that drive you out of Regan?
- Demon: It would bring us together.
- Father Karras: You and Regan?
- Demon: You and us.
- Father 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.
- Demon: I'm not Regan.
- Father Karras: Well, then let's introduce ourselves. I'm Damien Karras.
- Demon: And I'm the Devil. Now kindly undo these straps.
- Father Karras: If you're the Devil, why not make the straps disappear?
- Demon: That's much too vulgar a display of power, Karras.
- Demon: Mirabile dictu, don't you agree?
- Father Karras: You speak Latin?
- Demon: Ego te absolvo.
- Father Karras: Quod nomen mihi est?
- Demon: Bon Jour.
- Father Karras: Quod nomen mihi est?
- Demon: La plume de ma tante.
- [Karras sees Merrin dead on Regan's bed and gently moves him onto the floor; he beats Merrin's chest with force and checks for a heartbeat]
- Father Karras: You son of a bitch!
- [attacks Regan]
- Father Karras: Take me! Come into me! God damn you! Take me! Take me!
- [the demon transfers to Karras; he is about to kill Regan but stops]
- Father Karras: NOOOO!
- [jumps out of the window and rolls down the stairs outside the apartment, mortally wounded. He dies moments after receiving last rites]
- Father 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 Karras: There isn't a day in my life when I haven't felt like a fraud. I mean priests, doctors, I've talked to them all. I don't know anyone who hasn't felt that.
- Father 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's like saying you're Napoleon Bonaparte.
- Father Karras: It's my mother, Tom. She's alone. I never should have left her. At least in New York, I'd be near, I'd be closer.
- Tom, President of University: Could see about a transfer, Damien.
- Father Karras: I need re-assignment, Tom. I want out of this job. It's wrong. It's no good.
- Tom, President of University: You're the best we've got.
- Father Karras: Am I really? It's more than psychiatry, and you know that Tom. Some of their problems come down to faith, their vocation and meaning of their lives, and I can't cut it anymore. I need out. I'm unfit. I think I've lost my faith, Tom.
- Chris MacNeil: How does a doctor end up as a priest?
- Father Karras: It's the other way around; the Society put me through medical school.
- Father Dyer: [taking away Karras' whiskey] I reckon I saved him from a great temptation.
- Father Karras: Stealing's a sin.
- Lt. Kinderman: You know who you look like? John Garfield. Exactly, John Garfield, "Body and Soul." Do people ever tell you that, Father?
- Father Karras: Do people tell you that you look like Paul Newman?
- Lt. Kinderman: Always.
- Father Karras: [praying over Merrin's body] Ego te absolvo in nomine Patris, et Filiii, et Spiritus Sancti. Amen.