Three Internal Harmonies (of the Six Harmonies of "internal" martial arts and movement )

Copied from a post by Mike Sigman:

The ancient Chinese postulated the existence of "qi" to explain the type of phenomena in our example. Using "qi" like this involves "intent" aka "yi". So the Three Internal Harmonies say essentially that the "desire of the subconscious" (Xin) triggers the conscious mind (yi), the conscious mind then sends the qi to where it is needed for this physical action, and once the qi is in place it precedes the force (li or jin) that can be felt when someone like Paolo pushes. They said it like this:
Xin - Yi, Yi - Qi, Qi - Li

That's the Three Relationships aka the Three Internal Harmonies.