Chapter 11 - Convenience Versus Usage

Thirty spokes make a wheel,
Where the wheel sits empty,
Is where the cart gets its use.

The clay makes a cup,
Where the cup sits empty,
Is where the cup gets its use.

The door and window that make a room,
Where the room sits empty,
Is where the room gets its use.

The convenience is in the having,
The using is in the empty.

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.