I think when he said it, he was telling the truth, which makes the fact that he lied in Void much more chilling. Because now he's crossed that line and there's no going back.

Interesting. Do you mean that he's crossed the moral line since he made the promise to Lana, or is the lie itself crossing the line? (I can totally see lying about what he did, myself--I mean, would you tell anyone if your dead mom predicted you'd end up a murderer?)