When the great Tao is forgotten, goodness and piety appear. When the body's intelligence declines, cleverness and knowledge step forth. When there is no peace in the family, filial piety begins. When the country falls into chaos, patriotism is born.
LaoziWe 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.
Laozi