Taichi is about developing the strength, flexibility, sobriety and humilty to support energy. Not just to harbour it, but to encourage it to flow, through & beyond the body.
The most important principles here are:
Sink & Relax : gravity – Earth – root;
Central Equilibrium : calm & still amidst the seething;
Single-Weightedness : I am two – two legs, two arms, two hearts, two bellies, and the two combine as twine – a twine of wands – wrestling coils – from which wring & spring the twists & turns of the body, enabling me to move around both invisibly (without upsetting things) and powerfully (upsetting everything).