Dean Winchester: So, what's the verdict? Does he have a soul?

Donatello Redfield: I suppose the first question we must ask ourselves is, what is a soul?

Dean Winchester: Donny.

Donatello Redfield: What? I'm sorry. Um, I'd keep an eye on him, but I think if he seems okay, he probably is.

Dean Winchester: So he's not like you?

Donatello Redfield: Oh, no. I'm a Prophet of the Lord, but he... Jack's probably the most powerful being in the universe. I mean, really, who knows what's going on inside his head?