It makes me mad to think of it. How well I know what happened at the instant when they snatched him from you! There was a sudden clearing of his eyes (was there not?) as he saw you for the first time, and recognised the part you had had in him and knew that you had it no longer. Just think (and let it be the beginning of your agony) what he felt at that moment; as if a scab had fallen from an old sore, as if he were emerging from a hideous, shell-like tetter, as if he shuffled off for good and all a defiled, wet, clinging garment. By Hell, it is misery enough to see them in their mortal days taking off dirtied and uncomfortable clothes and splashing in hot water and giving little grunts of pleasure—stretching their eased limbs. What, then, of this final stripping, this complete cleansing?
Lewis, C. S.. The Screwtape Letters (pp. 171-172)