Hi Lou,
I've found the "experience" of the motto of significant benefit to understanding connectivity. My students also seemed to better grasp this fundamental concept.
I think I very much like using the word "connectivity" to sum things up, but need to ponder this some more since it raises for me the questions of "connectivity of what to what?" Perhaps, I could say that it is using the elbow and upper arm to connect the hand movements to the torso and waist movements and connecting the mind intent to the body movements. How do you see it?
Additionally ,I like to add the standing post arm posture but pushing the elbows out - in a static extension- while maintaining the finger tip distance. The connection to the spine becomes more apparent.
I was quite surprised to read this, because I have found myself "driven" to do almost the same thing in some of my Push Hands classes over the last month or so.
I have people "stand like a post" with the arms in a circle and the elbows slightly drooping down. I then ask them to contemplate the difference in feel between trying directly to form a circle with the arms (fingers almost touching) and forming a static equilibrium by gently pushing out at 8 points: the 2 elbows, the 2 shoulders, the 2 wrists, the chest, and the empty space between the fingertips. I then talk about the meaning of "relaxing," how it gives rise to Peng energy, and how we physically accomplish "sticking."
I also like to have people rotate their arms in this position in a very limited way that shows some of the links and transformation among Ward Off, Rollback, Press, and Push, both as we physically perform them in Grasp Sparrow's Tail and as we distinguish them in terms of push hands energies. If we still have time, I may also work on transferring the feeling of "elbow" energy in a few postures, such as Rollback, Lifting Hands, Cloud Hands, and Brush Knees. I occasionally even push and pull directly on the elbow to try to give a feeling of how it links to the Jin point. In Push Hands, we can do this in the very first one-hand horizontal circle, where I believe you should have a clear sense of the elbow pulling and pushing the energy along the arm. It is also present in all the other circles we do, but not always in such an obvious way.
Take care,
Audi