Fundamentally, most of the classical arguments for the existence of God can be simply seen as the realization that the world, us included, does not and cannot exist of its own power. In other words, everything we encounter, again, including ourselves, has being by participation and not of itself. This is the Truth that lies at the heart of metaphysics, it is the Truth of Genesis: We are created things.
This insight is not benign, for the original sin of man is pride, which is nothing else than a refusal to acknowledge our existence qua creatures. To understand that God is the Uncaused Cause or our Creator is the ultimate truth about ourselves that we must know in order to begin to be as God wants us to be.