Dao de jing 11
"Thirty spokes are united around a hub. The use of the chariot depends on its emptiness.
Clay is kneaded to make vases. The use of the vases depends on its emptiness. Doors and windows are made to make a house. The use of the house depends on their emptiness. Therefore, utility comes from being, use is born from non-being." Julian 11 Google's translation from French