Ruby
Castiel is young. He doesn't remember it the way that I do. We were once an army of creatures that God himself was proud of. Over the years, that army decayed due to neglect. Father wasn't as stern with them as he was in the beginning. He forgot about his children, so his children chose to fall out of line. Not as openly as I, but enough to make waves of change among our kind.
Sam, like yourself, is a special case. You've forgotten how much influence I've had over his life.