God is eternal. He lives outside of time. Scientists have trouble defining what time is exactly. There was no beginning for God. There will be no end for God. We cannot comprehend that. As we are above an ant, He is above us in understanding. For those destined for Heaven, time will once again have no meaning.
...and here we have an infinite loop as there may be a god above our god and on and on and on... This is like calculating Pi, there is no end and some things it is better to just give it up and move on.