Clay is moulded to make a vessel, but the utility of the vessel lies in the space where there is nothing. . . . Thus, taking advantage of what is, we recognize the utility of what is not.
heaven is eternal, earth everlasting. they endure this way because they do not live for themselves. in the same way, the wise person puts himself last, and thereby finds himself first, holds himself outside, and thereby remains at the center, abandons himself, and is thereby fulfilled.