I'd like to take a sec to touch some of my own skepticism and uncertainty:
There's all this talk about the "centers" - mental, emotional, physical... Each center is an "apparatus" or "mind" that dictates certain functions.
A lot of people have chopped up the centers into various subparts. One system tells you that each center has its own intellect, emotion, and movement. Another system will tell you that the physical center (more often called the "moving center") has three parts: motor, instinct, and sex. Et cetera.
I think this is kinda dodgy and hard to verify, especially since the centers are all working at the same time. If I want a healthy sandwich, is that intellect? emotion? body? a mix of all three, right? so how are these categories useful?
The self is a funhouse mirror - if you go looking into your own mental processes through the lens that there are two centers, God and the Devil, you will be able to recognize your thoughts and behaviors as either belonging to God or the Devil. What you seek so shall you find. So how can any of these divisions be "real"?
What I think is key here is that we're trying to figure out where our thoughts come from.
And through doing that, we're trying to develop something outside of those forces, which can moderate it.
I used to think of emotions as these more or less automatic processes that get in our way. I saw the rational, logical mind is the real self we have to listen to. After all, of all the centers, the intellect seems the most under our control. So isn't that the self?
But this line of self-observation illuminated to me the ways that my intellect is also mechanical, that it has its own needs which are sometimes in conflict with other parts of me. And if I focus on intellect, I become unbalanced. The consciousness we're working on is something outside of the intellect, something that can moderate it or make room for it as needed by the harmonious, combined self.
My advice would be forget about the source. It's as elusive as to be irrelevant. Might as well be emergence itself. I've written it off as the bit of me I can't look at (although it's fun to try). It's where the looking comes from. A point, not a thing. Models and terminologies are very much subject to the map/territory issue. Be mindful of this and then go exploring. There's a lot of different bits at play, as you've noted. Spend some time watching how they interact. Get to know them. Figure out what you want to do with them. Figure out how.