Listen, I know that it might sound unbelieveable, but... here is the proof (actually, only root of proof): The Enneagram Blogspot: Scientific Proof for the Enneagram
Okay, now, we can label the 4 Temperaments with the extremes of chemicals in the body:
Sanguine - High Serotonin - Too happy with life of theirs, calm
Melancholic - Low Serotonin - Too sad because of their life, moody
Choleric - High Norepinepherin - Too angry/nervous/I don't know, but it makes sense
Phlegmatic - Low Norepinepherin - Too calm, "Thinks when he must"
What do you think about it? The "Temperament crossbreeds" or I don't know how to call them, are those with both chemicals neutral (3) or with neither of them neutral (6, 7, 8, 9). If one of them is neutral (1, 2, 4, 5), they can show up as mostly that one, which have produced more that certain chemical (I know, badly formulated). So, if I would list it:
1 - Phlegmatic
2 - Sanguine
3 - Totaly phlegmatic?? (both chemicals neutraly produced)
4 - Melancholic
5 - Choleric
6 - Melancholic-Choleric*
7 - Sanguine-Choleric*
8 - Melancholic-Phlegmatic
9 - Sanguine-Phlegmatic*
* - Which is more dominant depends on chemicals (if Serotonine is more under average, or Norepinepherin is more above average, assuming "average" as neutral level)
If I would make it in some sort of table (sorry for bad ASCII), then it would look like this:
1|3|5 - Phlegmatic - Choleric
/It didn't shown the table as it has to be, so I edited it/
Do you recognize formations of those numbers (in rows, the order of them is not important)? Yes! Those are the formations about Harmonizing groups (or IDK how it is named).
How about columns? Yes! Triads of head, heart and body!
Coincidence? I think not.
What do you think?
Yeah, and one more thing: I am not so great at Enneagram, so it may be all wrong. It was only the outcome from my thinking processes, so you should accept it only as the Theory, nothing more. Even I am after finishing it looking still at Noreperiphine and thinking about what if it is reversed.