The traditional definition of God credits him with three attributes: moral perfection, omniscience, and omnipotence. These are supposed to be logically independent, with none entailing the others. But that is not obviously correct: How is moral perfection possible without omniscience and omnipotence? How is it possible to be omnipotent without also being omniscient?
By Colin McGinn | skeptic.com
Isn’t omniscience a type of omnipotence—a power to see and know everything? In fact, can’t we simply define God in terms of omnipotence, since his other attributes flow from this? If God is omnipotent he must be morally perfect, since he has the power to be morally perfect, and why would he not exercise that power? And if he is omnipotent he must be omniscient, since omniscience is an epistemic power. At the least he has the power to be both morally perfect and all knowing, given that he is all powerful. Thus omnipotence seems to be basic in the definition of God. God differs from lesser beings precisely in having powers they do not have—moral powers, epistemic powers, and other powers (causing earthquakes, healings, etc.). God is replete with power, overflowing with it, by no means lacking in it. Any power there is, he has.
God essentially lacks certain powers as a condition of being who he is.
But is that right? Does God have every power? He has the power to create and destroy universes, but does he have the power to sneeze or digest food or pick his nose? Those powers require possession of a body with a certain anatomy, but God has no such body, being disembodied. Does he have the power to decay or split or emit radiation? How could he have these powers given his immaterial nature? Does he have the power to come down with a cold or be bed-ridden or have the runs? Surely not: God has the powers that are proper to his divine nature, not any old powers that things of other natures have—animals, plants, atoms. God essentially lacks certain powers as a condition of being who he is. He has the powers of a god not of a worm or cactus plant. Everything must lack something in order to be something, i.e., to have a determinate nature.