Clay is fashioned into vessels; it is on their empty hollowness that their use depends. Doors and windows are cut out to make a dwelling, and on the empty space within, its use depends. Thus, while the existence of things may be good, it is the non-existence in them that makes them serviceable.
LaoziDo you want to improve the world? I don't think it can be done. The world is sacred. It can't be improved. If you tamper with it, you'll ruin it. If you treat it like an object, you'll lose it. There is a time for being ahead, a time for being behind; a time for being in motion, a time for being at rest; a time for being vigorous, a time for being exhausted; a time for being safe, a time for being in danger. The Master sees things as they are, without trying to control them. She lets them go their own way, and resides at the center of the circle.
Laozi