Does God really exist? Who is God? These are questions that intrigue every human being and strike at the very heart of human existence. The question of whether or not God ever existed has haunted humanity from the moment it began to think logically. Most philosophers say there could be God or numerous Gods, while some say there could be nothing. Human beings have only existed for so long that only a few fragments of history remain to study whether God really exists or not. There is a lack of knowledge or limited knowledge regarding this issue due to which no one can prove or be sure of the existence of God. The very perception of an absolutely perfect being means that God must exist, this is the usual ontological , or a priori, argument. Saint Anselm was the first to articulate this argument in the 10th century and argued that, because of the idea that men have of a perfect absolute being, which he defined as "that than which nothing greater can be conceived", it should exist. Pros logion, in one of his essays, Saint Anselm interprets God as a reality that preserves every possible perfection. But if this existence "existed" merely as an idea in our knowledge, then it would not be as perfect as, if it actually existed, something which would thus oppose our classification of God, a being deemed absolutely perfect. Therefore, God must exist. Gaunilo of Marmoutiers dismisses Anselm's idea by asking to perceive an island as “more excellent” than any other island, highlighting the defects of this type of argument. This type of a priori argument, i.e. pure deduction, is entirely imperfect, often superfluous, and completely fails to take empirical evidence... halfway through the paper... or not. First definition: God as creator of the entire universe in which we live. Second: Empirical science detects what lies within this universe. We have some kind of clues about things that might lie beyond it (other cosmoses in cosmology), but we have no direct explanations of such effects. Now: If God is the creator of this universe, this suggests that God must have been reality or existed before this universe. General relativity tells us that time and space are related or are the exact same thing. As experimental science detects this universe, it has no indication of anything prevailing or not prevailing outside this universe. It is worth pointing out that this is a "deistic" argument in sagacity that would tend to cast hesitation on the notion of an ethically impeccable, individual, domineering god (prevailing in the history of humanity, etc..).