Plato's Euthyphro dilemma:
P1: either God decides if something's moral or there’s independent morality God is subject to
P2: if God is source of morality, morality = arbitrary, meaningless - can will anything to be moral, including unjust acts
P3: if there’s independent morality God is subject to, God is superfluous to morality
C: Therefore, God is not omnibenevolent or not omnipotent