Tao Te Ching • Chapter 11
1.1 Thirty spokes are joined together in a wheel,
1.2 but it is the center hole
1.3 that allows the wheel to function.
2.1 We mold clay into a pot,
2.2 but it is the emptiness inside
2.3 that makes the vessel useful.
3.1 We fashion wood for a house,
3.2 but it is the emptiness inside
3.3 that makes it livable.
4.1 We work with the substantial,
4.2 but the emptiness is what we use.