The present state has served as the model of the future. We feel pleasure and pain - hence a heaven and a hell. A body is necessary for enjoying heavenly pleasures - hence the dogma of a resurrection.
But whence has the idea of hell arisen? Because, like a sick person who clings even to a miserable existence, man prefers a life of pain to annihilation, which he considers as the greatest of calamities. That notion was besides counterbalanced by the idea of divine mercy.