Castiel listened to the tirade with no change in his expression.

"You think I don't realize what she's done?" His voice remained even, calm, even if inside he was wanting to scream. "You think she hasn't totally betrayed me and everything I am? I loved her. I defied God for her. And all the while she was worshiping my brother, the one responsible for tearing my family apart all that time ago. So don't you lecture me on what she is."

He swallowed hard, still feeling the rage and grief at that revelation, even days later. It hadn't lessened, even with the daily talks with Ruby, trying to break through her flawed faith.

"I see someone who has been broken and yet doesn't seem to want to be fixed. Simply taking the temptation away will not cure your addiction, Sam." Castiel hesitated for a long, long moment, before reaching out to place a hand on Sam's shoulder, fully expecting to be punched for it.

"I think you're underestimating their capacity for forgiveness. It will take time, but that first step needs to be yours, no matter how hard you find it."