True quiet means keeping still when the time has come to keep still, and going forward when the time has come to go forward. In this way rest and movement are in agreement with the demands of the time, and thus there is light in life.
The hexagram signifies the end and the beginning of all movement. The back is named because in the back are located all the nerve fibers that mediate movement. If the movement of these spinal nerves is brought to a standstill, the ego, with its restlessness, disappears as it were. When a man has thus become calm, he may turn to the outside world. He no longer sees in it the struggle and tumult of individual beings, and therefore he has that true peace of mind which is needed for understanding the great laws of the universe and for acting in harmony with them. Whoever acts from these deep levels makes no mistakes.