Bobby: Back at Niveus, I watched that kid pull one civilian out after another, he must've saved ten people. Never stopped, never slowed down. We're hard on him, Dean. We've always been. But, in the meantime, he's been running into burning buildings since he was - what? Twelve?

Dean: Pretty much... 

Bobby: Look, Sam's got a... darkness in him, I'm not saying he don't. But he's got a helluva lot of good in him too. 

Dean: I know.