Thirty spokes unite around the nave;
From their not-being (loss of their individuality)
Arises the utility of the wheel.
Mold clay into a vessel;
From its not-being (in the vessel's hollow)
Arises the utility of the vessel.
Cut out doors and windows in the house (-wall),
From their not-being (empty space) arises the utility
of the house.
Therefore by the existence of things we profit.
And by the non-existence of things we are served.
三十辐共一毂,当其无,有车之用。埏埴以为器,当其无,有器之用。凿户牖以为室,当其无,有室之用。故有之以为利,无之以为用。