Let’s start with the Three-O God: omnipotent, omniscient, and omnibenificient — all-powerful, all-knowing, and all-good respectively. Now let us examine:
God commands right acts.
But does God command right acts because they are already right, or does His command make them right? Behold, from the days of Ancient Greek philosophy: The Euthyphro Dilemma. For, you see, a theist should not be satisfied with either option.
Firstly, if God commands right acts because they are right, then He is necessarily separated from morality: He is more of an intermediary, a communicator of moral good. It is no longer significant to say that God is the source of morality because, he is, as it were, merely passing morality along. Nor is it possible to say he is all-powerful, for he necessarily commands right acts, and is incapable of commanding evil. God has lost his qualities of omnipotence and omnibenificience.
Secondly, if God’s command makes otherwise-neutral actions right, then we could wake up tomorrow in a world where God commanded rape and torture for their own sake, and we would have to agree that they were good. What happens in such a case, in which God commands something which is a polar opposite to our moral intuitions? Certainly no theist would abide that anything and everything God commands will automatically be good because of His fiat.
So which is it?