Clay is moulded to make a vessel, but the utility of the vessel lies in the space where there is nothing. . . . Thus, taking advantage of what is, we recognize the utility of what is not.
LaoziThere was something formless and perfect before the universe was born. It is serene. Empty. Solitary. Unchanging. Infinite. Eternally present. It is the mother of the universe. For lack of a better name, I call it the Tao. It flows through all things, inside and outside, and returns to the origin of all things. The Tao is great. The universe is great. Earth is great. Man is great. These are the four great powers. Man follows the earth. Earth follows the universe. The universe follows the Tao. The Tao follows only itself.
Laozi