Qi is “perceived functionally, by what it does,” is critical to remember. Entities in Chinese Medicine are almost unanimously “perceived functionally,” that is, defined by what they do. We’ll see this affirmed again and again when we look at the meridian system. Meridians are defined by what they do, functionally – the organ system – organs are defined by what they do, functionally – and the Vital Substances of the body – which again are defined by what they do, functionally for the whole organism.
A point that many authors and practitioners of Chinese Medicine often reiterate is that as qualities of change, Yin and Yang are in a constant process of controlling and balancing one another. A static, unchanging balance is never achieved. What is observed and assisted, however — both by the skilled yoga practitioner and practitioner of Chinese Medicine — is a smooth process of balancing
By observing Yin and Yang dynamics both in the macrocosm and within the microcosm, the overarching intention was always one of promoting harmony. When honored, observed and respected, Yin and Yang describe processes of change that can be fluid, harmonious and balanced. Of course, if neglected or disregarded, the ceaseless process of change between Yin and Yang can break down and no longer be a smooth, harmonizing process of balance, but rather turn into a disruptive, chaotic, and jarring dynamic of imbalance.