When you look at some of the classics, you find written theories like this:
The body is LIVELY. When your body is sluggish, advancing and retreating cannot be done smoothly. Therefore your body should be lively. When moving your hands, there must be nothing resembling hesitation. When the opponent’s force hinders even the hairs on my skin, my intention instantly enters his bones and my hands are bracing him, all as one event. If he puts pressure on my left side, I empty my left side and my right side goes forth, or if he puts pressure on my right side, I empty my right side and my left side goes forth, the energy like a wheel.
The bold is mine. The energy is like a wheel. Or like one of those revolving doors like someone we all know uses as an example. Moving with energy like a wheel means to move in the center of you always. It's a very different way to move and requires a lot of retraining the body.
Mark
