A vessel is formed from a lump of clay with care, however, it is the empty space within the vessel that makes it useful.
LaoziWhat is well rooted cannot be pulled up. What is firmly grasped will not slip loose. It will be honoured from generation to generation.
LaoziThe Tao gives birth to One. One gives birth to Two. Two gives birth to Three. Three gives birth to all things. All things have their backs to the female and stand facing the male. When male and female combine, all things achieve harmony. Ordinary men hate solitude. But the Master makes use of it, embracing his aloneness, realizing he is one with the whole universe.
Laozi