One essential concept in Taiji is emptiness, from which the energy and creativity grow. The emptiness receives what's coming, dissolves it, and then returns in a different, unpredictable form.
Paco has a different description of it from a western perspective, after watching some Taiji in action. He thinks the center of body in Taiji is like a black hole in the sky, that absorbs everything nearby, turn it into primary particles and then eject in unison.
That is one great translation of a difficult concept between two cultures.