11

"Thirty spokes converge in a nave; just because of its nothingness [void] the usefulness of the cart exists.* Molded clay forms a vessel; just because of its nothingness [hollowness] the usefulness of the utensil exists. Doors and windows are cut into a house; just because of their nothingness [emptiness] the usefulness of the house exists. Therefore, profit from that which exists and utilize that which is absent.**"