Hmmmm.....well, when talking about the nature of God, one has to be prepared to think 'outside the box'. We are physical, natural beings that must obey the laws of nature, and too often we try to explain God in ways that fit in with those laws (i.e., is God the offspring of parents...). Unfortunately, it is very difficult to truly explain the nature of God on a human level, because, we are very limited in our thinking. We may think we are pretty smart, but in relation to God, our intelligence is infinitely small. Science, and even logic, can never truly explain God. God is the ultimate Source of everything in existence. He does not need to be proved through science--He is the creator of Science, and therefore above it. He is not limited by Time--He created Time. Just trying to fully comprehend Him blows one's mind apart. We are tiny, finite beings, trying to explain something (Someone, actually) that is infinite.
In the Bible it says that no man has seen God at any time. He refers to Himself as the the great I AM. To me that is very significant. He simply IS. He always has been, and always will be in existence. Of course, there is no way we can comprehend that, so don't even bother trying. We humans try so hard to put God in boxes we can understand, when in reality, He cannot be put in boxes. I truly believe it will take us all of eternity (and He offers this eternity to us), to truly know and understand Him, because He is that deep and vast in every aspect.
Keep seeking, truthseekingsoul--I commend you for that.