In ancient times, people said that imperfect moves to becoming perfect. Are these words vain? No! Truly, by gaining Unity you come to Perfection!
LaoziClay 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.
Laozi