Filed under: Moment of Zen
The thirty spokes unite in the one center; but it is on the empty space for the axle that the use of the wheel depends. Clay is fashioned into vessels; but it is on their empty hollowness that their use depends. The door and windows are cut out from the walls to form an apartment; but it is on the empty space that its use depends. Therefore, whatever has existence serves for profitable adaptation, and what does not have existence for actual usefulness.
- Lao Tzu
Tao Ching, (The Book of Changes)