Bible tells us that God is eternal and good numbers of verses are in answer posted by “Software Monkey”. Another imposing verse in Bible is from Isaiah 41:4 which says “.... I, the LORD, am present at the very beginning, and at the very end – I am the one.”
Although scientists now believe the universe had a beginning from nothing, they can’t tell us who was there to start it all. John reveals that before creation, “the Word already existed” and was “with God.”:
In the beginning was the Word, and the Word was with God, and the Word was fully God.
Leaving aside these assertions from Bible that God being eternal, for a moment let us assume that God did not exist at the beginning. Imagine a time when there was nothing in existence neither God existed nor the universe or even the voids (empty space). Not even energy, matter, volume, space, time, thoughts, concepts or any physical laws. There was absolute nothing or absolute non existence. In this state of nothingness, the question that arises: how something had its origin from this state of “absolute nothing”?
“Absolute nothing”, is complete “non-existence”. No energy, matter, volume, space, time, thoughts, concepts, mathematical truths, etc., and no minds to consider this complete "lack-of-all". The mind of the reader trying to visualize this would be gone as well. But, in this "absolute nothing”, there would be also no mechanism present, to change this “nothingness” into the “something” that is here now. Nonetheless, because we can see and perceive that “something” is here now, the only possibility then is that “absolute nothing” was somehow instrumental in creating this “something”.
The fact is: This “absolute non existence” is not same as our mind’s conception of non-existence. In this absolute non existence neither the mind nor anything else is present. Because our minds exist, our mind's conception of non-existence is dependent on existence; that is, we must define non-existence as the lack of existence. But, non-existence itself, and not our mind's conception of non-existence, does not have this requirement; it is independent of our mind, and of existence, and of being defined as the lack of existence. Non-existence itself is on its own, and on its own, completely describes the ENTIRETY of what is there and is thus an “existent state” (which is inconceivable with our existent mind). Thus this “existent state” was instrumental in creating this “something” from itself. To our finite mind it is “absolute nothing” but that “State” is God eternal.
Therefore God is beyond our comprehension and He has no creator. He is a unique Force, capable of producing something from what we define as “absolute nothing”. It is an Eternal Entity that has been the initial cause of everything that we perceive-universe and everything that universe comprises of.