“A wholly good omnipotent being”, contended J. L. Mackie, “would eliminate evil completely; if there really are evils, then there cannot be any such being” (Mackie 1982: 150)
Is it necessarily true that a wholly good omnipotent being who is able eliminate evil, would eliminate evil? Is it necessarily true that a wholly good omnipotent being who cannot prevent pain and suffering, would be impotent?
Thomas V. Morris and Peter van Inwagen contended that the notions that if God exists, He would eliminate evil, and if He cannot eliminate evil, He is not omnipotent, are not necessarily true.
Following Morris, what we mean by a being B can do x, is either B’s ability, viz., B is “ able to do x” or B’s capability, viz., B is “capable of doing x”(Morris 1991). With this in mind, it become clear that God, a wholly good omnipotent, could be able to eliminate evil, but either God is morally incapable to eliminate evil without eliminating good, viz., God’s incapability to create a creature C who possesses true freedom of will and C only do good and never do evil, or God has sufficient moral reasons not to eliminate evil.