by Wu Yu-hsiang (Wu Yuxian) (1812 – 1880)
sometimes attributed to Wang Chung-yueh
as researched by Lee N. Scheele
The hsin [mind-and-heart] mobilizes the ch’i [vital life energy].
Make the ch’i sink calmly;
then the ch’i gathers and permeates the bones.
The ch’i mobilizes the body.
Make it move smoothly, so that it may easily follows the hsin.
The I [mind-intention] and ch’i must interchange agilely,
then there is an excellence of roundness and smoothness.
This is called “the interplay of insubstantial and substantial.”
The hsin is the commander, the ch’i the flag, and the waist the banner.
The waist is like the axle and the ch’i is like the wheel.