It really, really wasn't. "God only speaks to one angel. But he sent us a message. Back off and don't bother finding him. He didn't want anything to do with us." Castiel took a long pull from his drink. "I believed in him."

That little story probably went a long way in explaining why Castiel was currently being bitchy and getting trashed -- though not why he was damp, shirtless, and bandaged up.