We put thirty spokes to make a wheel: But it is on the hole in the center that the use of the cart hinges. We make a vessel from a lump of clay; But it is the empty space within the vessel that makes it useful. We make doors and windows for a room; But it is the empty spaces that make the room livable. Thus, while existence has advantages, It is the emptiness that makes it useful.
LaoziDo nondoing, strive for nonstriving, savor the flavorless, regard the small as important, make much of little, repay enmity with virtue; plan for difficulty when it is still easy, do the great while it is still small. The most difficult things in the world must be done while they are easy; the greatest things in the world must be done while they are small.
Laozi