The Problem of Pain is a 1940 book on the problem of evil by C. S. Lewis, in which Lewis argues that human pain, animal pain, and hell are not sufficient reasons to reject belief in a good and powerful God.

Lewis summarizes of the problem of evil like this: "If God were good, He would make His creatures perfectly happy, and if He were almighty He would be able to do what he wished. But the creatures are not happy. Therefore God lacks either goodness, or power, or both."[1] His partial theodicy addresses human suffering and sinfulness, animal suffering, and the problem of hell, and seeks to reconcile these with the Christian belief in a just, loving, and all-powerful God.