la revue de l'Association des collectionneurs de céramique du Québec (In French only).
Thirty spokes share the wheel's hub;
It is the center hole that makes it useful.
Shape clay into a vessel;
It is the space within that makes it useful.
Cut doors and windows for a room;
It is the holes which make it useful.
Therefore benefit comes from what is there;
Usefulness from what is not there.
Lao Tseu, Tao Te King
(translated by Gia-fu Feng and Jane English)