Greetings..
Simply from a differing perspective, i offer these observations..
It seems that sometimes we tend to "look at the finger" rather than what it's pointing to.. the almost fanatical discection of words and meanings seems to be a distraction from the experience we seek.. perhaps, if we try to comprehend the phenomenon from the context we are most used to we can better share our experiences toward a deeper understanding.
As a student of "energy" for many years (in excess of 30).. it is my own understanding that what we debate is differences of cultural perceptions.. Chi, energy, Ki, etc.. are the same experience from differing perspectives. Some cultures cultivate energy (chi) in a personal and social context.. others, develop it as a tool.. for conquest or profit.. It goes to what a few of the participants, in this and other boards, stated.. ultimately, consciousness is the prime factor.. energy is the raw material of the universe and consciousness is the weaver.. we will create according to our intentions.. if our intention is to utilize the energy/chi to promote Tai Chi, and we have the "will" (discipline) to make it so, then.. it is so.. Likewise, those that would intend differently, with similar discipline, will be equally effective.. The key is in the strength and focus of consciousness, the ritual is only as effective as the mind behind it..
Lastly, as i have said before, there is quite a scientific body of research supporting the connection between mind and energy, verifiable evidence that beliefs affect outcomes, that the mind can manipulate energy.. This, i believe, lends credence to the "mind leading Qi" concept, yet.. equally, if one truly believes this system, the leading is effortless, no more that a glancing thought.. and, at some point, simply a natural interaction with life itself.. Which, by the way, i agree with the analogy of Qi being the interaction between Yin and Yang, like there's no "game" until the "teams" interact.. none of which happen unless there is "energy" to power it .. i sense that Yin/Yang represent our conceptual perspective of duality/reality.. Qi, on the otherhand, is what powers it all.. Qi is indiscriminate, a source to be used.. yin/yang, just another conceptual variation on Duality..
I hope that someday we will move beyond our struggles with cross-cultural conceptual difficulties.. and begin to formulate a language/database consistent with our own understandings.. Certainly this is not an ethnic bias.. i hold my education in the Chinese Arts in a most respectful light, in fact, it has been the foundation that moved me into "my own" understanding of "me". I guess i just feel a little saddened watching people fret over the words and concepts of others, when usually, at the source, they are experiencing exactly the same thing..
Just for fun, try explaining these concepts to each other without using any words other than english.. try drawing only on the experiences you have had directly, coin some new phrases, mostly.. be creative, that is our gift.. never forsake your roots, but never stop growing..
Be well.. create yourself, or others will do it for you..
TaiChiBob.. "the teacher that is not also a student is neither"