I prefer to use the term divine over God and believe while it's not synonymous with the universe, the universe is permeated with the divine.

I characterize the divine as law, life, and love-- law being the physics of the universe, life the basis of awareness, and love our conscious creating, enjoying, and sharing.

Since this is ontological (in the sense of defining a concept into being), rather than requiring evidence of existence I would ask myself if this is a valid concept of the ultimate, at least vis-a-vis the human experience. If I postulate that life (awareness) is good, which I do, it works to my satisfaction.