If there was ever a time when nothing existed then there would be nothing still, because nothing has no potential to become something. Out of nothing, nothing comes. And yet there is something, so we know there has never been a time when nothing existed. Something has always existed. What is that something?

Could the universe be eternal? No, as evidenced by the thermodynamic properties of the universe. The energy in the universe is finite and increasing toward entropy. If the universe were infinitely old, we would have reached a state of entropy an infinite time ago. And yet we have not reached a state of entropy, therefore the universe is not infinitely old. It began to exist a finite time ago.

If the universe has not always existed, what has? Given the maxims that every effect requires an adequate cause, and nothing is self-caused, that which has always existed must be the causal explanation for the universe coming into being a finite time ago. What could have done so? Given that whatever caused space, time, and matter to begin to exist cannot itself be spatial, temporal, or material, we are limited to two possibilities: abstract objects, or an unembodied mind.

Since abstract objects are causally impotent by definition, they cannot be the cause of the universe, and thus are unlikely to be that which has always existed. That leaves us with an unembodied mind as the eternal something. This makes sense. Not only are we are intimately acquainted with the idea of minds creating things, but it also makes sense of the design and order we see in the universe. An intelligent agent is best explains why the universe is as it is.

Since an eternal, non-spatial, immaterial, intelligent mind is what most mean by “God,” it is best to conclude that God is that which has always existed. He is a necessary being, who contains within Himself the sufficient cause for His own existence, as well as the existence of everything else.