The eternality of God is just one implication of his infinite nature and ultimately the outcome of a God who is the most supreme, perfect being. Time is fraught with limitations; a being in time is a being bound by all the characteristics of time: change, composition, dependency, and impotence. But a perfect being can have no such limitations because he is, by definition of being perfect, infinite in nature. He is his attributes in all their fullness, to the absolute degree.
