
Here's the outside of the box thinking part..
Lets start with science.
The Law of Causuality states that everything that had a beginning had a cause. (There was a reason why it was created, a force, an action, etc).
God was never created. If that were the case, there would have been another "God" to create Him and the cycle would continue. Since God was never created, He does not need a cause. Nothing caused Him to "appear". Simply as it sounds, He just IS.
God is not a person or a thing that we can grasp or physically define, not like matter. Matter is a physical substance which has a chemical makeup. We can verify this scientifically in all forms of matter. Matter cannot just appear. Because matter needs a cause, it could not have existed without one.