"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."
- Tao te Ching
And, as a demonstration:
At Moorditch, Richard Wilbur
"Now," said the voice of lock and window-bar,
"You must confront things as they truly are.
Open your eyes at last, and see
The desolateness of reality."
"Things have," I said, "a pallid, empty look,
Like pictures in an unused coloring book."
"Now that the scales have fallen from your eyes,"
Said the sad hallways, "you must recognize
How childishly your former sight
Salted the world with glory and delight."
"This cannot be the world," I said. "Nor will it,
Till the heart's crayon spangle and fulfill it."