We join spokes together in a wheel,
but it is the center hole

that makes the wagon move.

 

We shape clay into a pot,

but it is the emptiness inside

that holds whatever we want.

​

We hammer wood for a house, 
but it is the inner space

that makes it livable. 

​

We work with being,

but non-being is what we use.

(Daodejing11)