I have certainly seen some material on the Forums this week that represent disparate views. This attempted analysis in note intended to vilify ANY of the various points of view on any subject.
In our system and community (meaning the Uechi Community) there are different views on many subjects.
Perhaps the most clear cut would be the opinions expressed regarding sparring, aggressiveness, tournament fighting vis a vis kata, bunkai, defensive (vs. offensive ) mindset.
The system is an eastern one and an analysis of it and its community might help us, in theory, to understand what is actually going on.
Reference is made to "T'ai Chi Classics" by Waysun Liao, only for definitions of Yin and Yang and not to push T'ai Chi;
"one reaches the ultimate level or develops in tht direction by means of the ladder of balaced balanced powers and their natural motions-"Yin", the negative power (yielding) and "Yang", the positive power (action)."
We should perhaps see the aggresiveness inherent in an art meant to teach us to win
confrontations as the "Yang" component of our family and the "no first strike" and always block first" and relatively quiet study of Kata as manifestations of the "Yin".
The point simple being that these forces exists in us, in OUR family and/or the system and it is not necessarily, therefore, a matter of right and wrong, polarization by characterization, but rather of realization that a. both elements are necessary parts of the "family" b. both elements are a necessary part of the world c. that the "tension" between the two manifestations is part of the deal and d. that they require each other to some extent.
To allow dominance of one over the other would be dangerous. Evil occurs in this way of looking at things only when one acheives predominance over the other, creating an imbalance.
There is limited parallel in the "light" vs. "dark" themes prevalent in Christian, Jewish and Zorastrian lore, in that neither the Yin nor the Yang is evil, or good. Imbalance creates evil results. Neither is "balance through frozen thought good, in that it may be implied that "stasis" contains both evil and good elements, plus stagnation.
I hope this thinking is valid and helpful.