Jonathan Marks:
I highly doubt the stages of insight, have anything to do with serotonin. At the same time this reminds me a lot of Tibetan and Daoist practices, primarily because, they tended to think that Awakening had a lot to do with the circulation of some form of energy. I'm pretty sure the circulation of energy has nothing to do with Awakening.
The reason being that the circulation of energy doesn't fall into any of these categories: morality, concentration or insight.
Hmm, wow.
In my experience 'energy' in the sense you are referring to just means a subtle, preverbal mode of experiencing as the body (subtle sensations). It's sort of like a direct machine-language appreciation of dynamics that also manifest at higher levels of 'software' with coarser structures-- more overtly verbal-conceptual and perceptual ones.
So any experience that can be had on a coarse, conceptual level, such as experiences of 'morality, concentration and insight' can also be had at subtler, less constructed levels, which 'feel' more energetic, sensate, subtle, direct, emobodied, complete, visceral, etc. In fact it seems like to really appreciate the depths of morality, concentration and insight one must penetrate to this subtle, pre-conceptual and non-verbal mode of experiencing: the 'energetic'.
So I wonder what you are talking about when you make such blanket conceptually definitive statements ("energy doesn't fall into any of these categories"). The latter statement sounds like it is being made by someone with more of a conceptual and less of an experiential view. To pretty much everyone I've spoken with who actually exhibits qualities of awakening, and in my own small share of experience that I might label with the term, 'awakening' itself doesn't fit into any categories, so...
It's too bad you aren't going to share experiential descriptions of your own practice and realization, because I would like to know what your experiential understanding of 'energy' or 'concentration, morality and insight' are? It would make it easier to get what you are trying to say.