I have this idea... what do you think..
God is all knowing and perfect. God knows himself hence has an idea of himself. His idea of himself is perfect and exactly like himself in everything. So if God can exist on its own so his idea of himself can exist on its own, so even if God will think of other things, his idea of himself will not cease to exist. It is alive on its own like God.
If God is eternal and almighty the same with his idea of himself.
When God thinks of Himself it is exactly like him in everything otherwise it is not perfect.
God who generates an idea of himself is Father and the idea of Himself generated which exactly and perfectly like God is the Son.