It's difficult for mere mortals like us to comprehend that God always was and always will be because we measure the short time between our birth and death in minutes, hours, days, weeks, months and years.
That short span is like an instant.
I remember laying on the nets beside the DASH hangar, hanging over the south China sea, on a tin can in 1967. In the dark, there were so many stars visible, as to be incomprehensible. The ocean waters, flowing past the ship, roiled to reveal a glowing phospohorescence, lighting sea creatures as we passed. It looked like neon lights, in the dark waters. It was a deeply moving experience.
I remember thinking of how it could not possibly have come from nothing, and I am still convinced. It is much easier to believe in God...
I am searching for it, but there seems some theory to suggest that time doesnt actually exist. Nor does depth and the the universe is really only 2 dimensions and that it is the peculiarities of time/space caused by gravity taht makes our reality appear this way.
Time is just a dimension and God would surely not be constrained by it.