Tertullian

God is one thing, and what belongs to God is another thing.… How will you employ in a comparison with God an object as your example, [such as a king] which fails in all the purposes that belong to a comparison? Why, when supreme power among kings cannot evidently be varied but only unique and singular, is an exception made in the case of him (of all others) who is King of kings, and (from the exceeding greatness of his power and the subjection of all other ranks to him) the very summit, as it were, of dominion?