“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 the truth to attack us. The attack is psychological, Damien, and powerful. So don't listen to him. Remember that—do not listen.”
More from William Peter Blatty
“Let Jesus fuck you, let Jesus fuck you. Let him fuck you.”
“You're going to die up there.”
“Demon: I'm not Regan. Father Karras: Well, then let's introduce ourselves. I'm Damien…”
“Your mother sucks cocks in Hell, Karras, you faithless slime.”