All things in nature work silently. They come into being and possess nothing. They fulfill their function and make no claim. All things alike do their work, and then we see them subside. When they have reached their bloom, each returns to its origin. . . . This reversion is an eternal law. To know that law is wisdom.
If princes and kings could follow it (Tao), all things would by themselves abide, Heaven and Earth would unite and sweet dew would fall. People would by themselves find harmony, without being commanded.
Seal the openings, shut the doors, and until your last day you will not be exhausted. Widen the openings, interfere, and until your last day you will not be safe.
We join spokes together in a wheel, but it is the center hole that makes the wagon move. We shape clay into a pot, but it is the emptiness inside that holds whatever we want. We hammer wood for a house, but it is the inner space that makes it livable. We work with being, but non-being is what we use.