Sculptural Space

Thirty spokes will converge in the hub of a wheel; But the use of the cart will depend on the part of the hub that is void.
With a wall all around, a clay bowl is moulded; But the use of the bowl will depend on the part of the bowl that is void.
Cut out windows and doors in the house as you build; But the use of the house will depend on the space in the walls that is void.
So advantage is had from whatever is there; But usefulness rises From whatever is not.

From the Tao Te Ching by Lao Tze