Recent knowledge of how the brain works and about how our visual ability relates to our ability to perceive what is going on around us accurately impacts our perception:
The combination of "attachment" and "fill-in" creates our concept of personal experience. Our egos are easily attached to "being right" or "finding the answer", this further allows our perceptions to mis-read the signals, and mis-read the energy. On top of these issues are socio-economic norms, cultural influences, physiological and psychological illnesses that all affect how the primary energy manifests.
Another level of complication is, because this is not known and recognized, the depth and significance of the differences is not appreciated, and those around us are not able to see and support the great gift of the active power center. We develop mental ideas of what we are and what we should be based on what those around us reflect back to us. The result is we rarely have a clear understanding of our innate Natural Energy's gift. This is the primary reason that self-questionnaires, like those used to determine Enneagram type, often yield a different type than the physical process for determining the active Power Center.
Another contributing factor is that nine is a complex number of variables. Natural Energy does not repeat in nuclear families. It is rare to be in a group of your own Natural Energy. We rarely hang-out with our own kind. The experience of seeing people of the same phsyiology side by side almost never happens. When it does, it can be mind-blowing. Think about when you have seen someone that reminds you of someone else, this usually happens when two people share Natural Energy and other similar physiological traits like race, gender, coloring.
Here is an example in the photo of Susan Fisher, Natural Energy 6, Co-Founder of 9 Energies, and her friend Lisa Christie, Natural Energy 6 - they are almost mirror images of each other:
We are interested in your perspective on this discussion as well. And any research on learning, brain activity, of any type that might shed some light on this subject would be much appreciated.