AU: Castiel pays a visit to the Doctor just after the Ponds departure (a sequel to this)
└ "You’re full of grief, vexation and guilt. The guilt has sunk so deep into your soul that you started to live on it as if it was the only emotion left in you. And you started to believe in it and you started to loathe yourself. You’re not the same man, Doctor. That man, the man I knew— he’s gone."