One of the primary concerns with the concept of God and his demons is the problem of evil. If God is all-powerful, all-knowing, and benevolent, why does evil exist? The presence of demons, or malevolent entities, seems to contradict the notion of a benevolent God. This paradox is often referred to as the "problem of evil." If God is capable of preventing evil, knows that evil exists, and desires to prevent it, then why does evil persist?