Chris MacNeil: How does a doctor end up as a priest? Father Damien Karras: It's the other way around, the Society put me through Medical School.
Demon: [as Father Merrin enters the house] [with terrible rage] Demon: MERRIN!
Father Damien Karras: [praying over Merrin's body] Ego te absolvo in nomine Patris, et Filiii, et Spiritus Sancti. Amen.
Father Damien 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.
Chris MacNeil: Would you like some bourbon in that, father? Father Merrin: Well, my doctor says I shouldn't but thank God my will is weak.
Lt. Kinderman: You know who you look like? John Garfield. Exactly, John Garfield, "Body and Soul." Do people ever tell you that, Father? Father Damien Karras: Do people tell you that you look like Paul Newman? Lt. Kinderman: Always.
Chris MacNeil: Is it over? Father Damien Karras: No Chris MacNeil: Is she going to die? Father Damien Karras: No!
Lt. Kinderman: [to Chris] A draft in the fall when the house is hot is a magic carpet for germs.
Regan MacNeil: I heard... differently.