By Einstein Equations IncorporatedSeptember 14, 2019Category: UncategorizedTags: emptiness, lao tzu, tao te ching 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. (Chapter 11, Tao Te Ching – Translation by Gia-fu Feng and Jane English)