That reminds me of a moment when Nick was talking to someone, it was in his rented house, and the other person used some colloquialism that mentioned God, and Nick felt compelled to suggest an altering of it so that it didn't say anything nice about God--- something like that.
Nicholas could have just gone along with it, and he could use such expressions himself to allay suspicion.... but at the risk of revealing himself, he feels he has to avoid saying anything (or seeming to agree with anything by way of silence) pro-God! Either he's some cursed creature himself, or he's loyal to the devil, or he's afraid Diabolos (The Devil, or not the Devil? You decide!!) will hear him and he'll get in trouble. I thought that was interesting.
What was that exchange?