Many times when one has a God Complex, one is identifying ego with the super-ego.
There is a lot to be said for integrating the two ("I and the Father are one"). But that's a lot different from the ego identifying with the super-ego.
In the situation where the ego identifies with the super-ego, it is merely jumping out of the way of the guilt being thrown at the ego by the super-ego through identification with it... yet the guilt still exists and is projected outward toward the world. In this situation, the sensation of God is still separate from the ego because in fact the two are not yet integrated within the individual.
However, during the process of integration, ("I and the Father are one"), the guilt disappears altogether. The sensation of God is not one "out there", it's one "in here". This is what is being referred to as "The kingdom of heaven is inside of you". Here is the kicker though... because the only way to achieve this integration is through the process of forgiveness for oneself, for others, for circumstance etc. So even though the integrated psyche now sits on the throne of God, it's not one that generates a sense of having authority over others because the psyche now has total authority over itself.
Many people stumble on the road to Autotheism and end up with complexes, because of something they just can't (or won't) let go of. In the end, one truly has to be "born again", "washed in the blood" or whatever phrase you like to apply which means they have stopped serving "Mammon" (or the external world) and instead "dwell within the kingdom".
Ironically, those with the most guilt based religious training as a child are the ones most apt to derive a complex, because they just can't let go of the sensation that there is someone outside of themselves that has authority over them, so integration never occurs.
