And maybe it's not.
You mean like this:
When God came into existence there was nothing else all was void. His first thought must have been self awareness. The only possible outcome of an omnipotent being becoming self aware would be for that awareness to be a mirrored reflection or that omnipotent perfection.
When the second being instantly became sentient there was no longer the void, There was only the "Father."
And then the statement the Council of Nicea taught that God came into existence.
This sounds more like Jehovah Witness theology.