The (state of ) vacancy should be brought to the utmost degree, and that of stillness guarded with unwearying vigour. All things alike go through their processes ov activity and (then) we see them return (to their original state). When things have displayed their luxuriant growth, we see each of them return to its root. This returning to their root is what we call the state of Stillness; and that Stillness may be called a reporting that they have fulfilled their appointed end.-Tao