Water, when it is still, reflects back even your eyebrows and beard. It is perfectly level and from this the carpenter takes his level. If water stilled offers such clarity, imagine what pure spirit offers! The sage's heart is stilled! Heaven and Earth are reflected in it, the mirror of all life. Empty, still, calm, plain, quiet, silent, non-active, this is the centeredness of Heaven and Earth and of the Tao and Virtue.