User blog comment:ImperiexSeed/Castiel's shifting of Sam's mental problems made no sense!/@comment-3045936-20120406172145

I use my last idea that by using a different version of Soulchanneling. As souls are pure energy they cannot be destroyed. So minus God creating the human souls for energy cannot be created or destroyed just rechanneled so it would explain why even death could destroy the damage parts of Sam's soul, but might explain how Cass siphoned or moved that part to his own spiritual form.