Antoine de Saint-Exupéry:
Perfection is achieved, not when there is nothing more to add, but when there is nothing left to take away.
Lao Tse:
Thirty spokes meet in the hub,
But the empty space between them
is the essence of the wheel.
Pots are formed from clay,
But the empty space within it
is the essence of the pot.
Walls with windows and doors form the house,
But the empty space within it
is the essence of the home.
Lin Yu Tang:
Besides the noble art of getting things done, there is the noble art of leaving things undone. The wisdom of life consists in the elimination of nonessentials.