Thirty spokes
meet in the hub.
Where the wheel isn鈥檛
is where it鈥檚 useful.

Hollowed out,
clay makes a pot.
Where the pot鈥檚 not
is where it鈥檚 useful.

Cut doors and windows
to make a room.
Where the room isn鈥檛,
there鈥檚 room for you.

So the profit in what is
is in the use of what isn鈥檛.

Le Guin, Ursula K.. Lao Tzu: Tao Te Ching: A Book about the Way and the Power of the Way. United Kingdom, Shambhala, 2019.