The majority of the human race dies in infancy; of the survivors, a good many die in youth. It is obvious that to Him human birth is important chiefly as the qualification for human death, and death solely as the gate to that other kind of life. We are allowed to work only on a selected minority of the race, for what humans call a ‘normal life’ is the exception. Apparently He wants some—but only a very few—of the human animals with which He is peopling Heaven to have had the experience of resisting us through an earthly life of sixty or seventy years.

CSL, Screwtape Letters