' The Invisible '...

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 profit comes from what is there;
Usefulness from what is not there.




- Lao-tzu

Tao Te Ching
Translation by Gia-fu Feng and Jane English
Vintage Books Edition, September 1972