thirty spokes put together make a wheel
but it is in the space where there is nothing
that the usefulness of the wheel depends
clay that is shaped will make a pot
but it is in the space where there is nothing
that the usefulness of the poet depends
wood that is cut will make a house
but it is in the space where there is nothing
that the usefulness of the house depends
therefore we should value not only what is
but also what is not.
