Obsession. Such a simple word for something that can come to encompass one's life. The word itself wasn't big enough to hold all its meanings, not near enough to explain all the feelings. All this flashed through Sam's head as he stared out the window of the Impala. Thanks to the information Gabriel had entrusted to them before the archangel died, they knew how to defeat Lucifer. They knew how to put him back in his cage. Sam just wished, when he allowed himself to think about it, that the knowledge hadn't come at such a cost.
"Whatcha thinking about, Sammy?" Dean interrupted his thinking. "We're doing good. Got three rings already."
"I'm t