[ Sam really can't deny the fact that his omission of information wasn't intentional. It was. He didn't want anyone to know, especially Dean, either Dean. It was safest that way, or so he thought. He should have guessed that it would eventually blow up in his face, but...Sam hoped.

And he hoped more because Lucifer seemed to be questioning things that he hadn't considered in millennia of years. That there might be a way to end this before it starts. ]

What, so you can come flying at the devil like you're doing right now? You'd be killed, Dean! [ He shakes his head. ] I don't care if people come back. You dying here wouldn't do anything. I don't want that.