omnipotence and the problem of evil
Plantinga made a good point in his book, God, Freedom, and Evil. The logical problem of evil is the idea that the set of propositions including "God is omnipotent, omniscient, and wholly good," and "Evil exists," are contradictory, and therefore cannot both be true. Most theists do not understand omnipotence to mean that there are no limits to what God can do. They usually understand it to mean there are no non-logical limits to what God can do. God cannot, for example, bring it about that he both exists and doesn't exist, or that necessarily true statements are false, or that there are square circles, etc. You see, part of J.L. Mackie's argument against God included the premise that "There are no limits to what an omnipotent being can do," in order to argue that God could have created a world containing moral good, but no moral evil. The point Plantinga made that I thought was good was this: If theists agree with Mackie that there are absolutely no limits to what an omnipotent being can do, then the problem of evil poses no problem for them, because, as they say, God can do what is logically impossible. If being omnipotent means that God can bring about logically impossible states of affairs, then the fact that the problem of evil describes a logically impossible state of affairs is merely a curiosity, but not a problem.