The sage wears clothes of coarse cloth but carries jewels in his bosom; He knows himself but does not display himself; He loves himself but does not hold himself in high esteem.
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.
To attain to the human form must always be a source of joy. And then to undergo continuous transitions, with only the infinite to look forward to: what incomparable bliss is that!