What an excellent day for an exorcism.You would like that?Intensely.But wouldn't that drive you out of Regan?It would bring us together.You and Regan?You and us.

I'm not Regan.Well, then let's introduce ourselves. I'm Damien Karras.And I'm the Devil. Now kindly undo these straps.If you're the Devil, why not make the straps disappear?That's much too vulgar a display of power, Karras

Demon:

Your mother's in here, Karras. Would you like to leave a message? I'll see that she gets it.

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 the truth to attack us. The attack is psychological, Damien, and powerful. So don't listen to him. Remember that - do not listen.