What we call God is a celestial light that gives rise to the myriad dimensions of heaven that are located inside the holographic fields-upon-fields. Every grain of sand contains all the heavens and hells inside it.
But very few people have ever seen the celestial light, one person in a million maybe, or maybe one in ten million, so it is hard for humans to believe in God as a light.
Humans can garner a lot of the light and then a human may become God to other humans: Buddha, Shiva, Jesus etc. But no one human can garner all of the light, for it stretches beyond this universe into a trillion other universes that no human from earth has ever been into or even seen.
Light moves at 300,000 kilometers a second; it might move even faster in the heavens. If, in one special instant in time, a human suddenly became all of the light, by the time they sat down for a cup of tea to mull it over, the light would be 200 million kilometers further away. Interesting eh? No human can keep up with the God-light, our brains are too slow and it’s too fast.