After Satan corrupted man, they have become ever more fallen, afflicted by increasingly severe illnesses, and suffered more and more deeply. They felt more and more intensely the emptiness and misery of the human world, how hard it is to survive in it, and they lost hope for it as time went on. All such sufferings were caused by Satan. To regain mankind’s good destination from Satan’s hand, God has to taste these sufferings and pay this price personally, so that man can completely return to God. Now God has undergone all sufferings in man’s stead and paid this price personally, serving as powerful evidence. In the future mankind will no longer have the sorrows and joys and partings and reunions of the world, the griefs and worries of the flesh, or the birth, age, illness, and death of the world, and man will completely belong to God and enter into mankind’s good destination.
from “The Meaning of God’s Tasting the Worldly Sufferings” in Records of Christ’s Talks With Leaders and Workers of the Church