What does it mean?

It is the nature of stone
to be satisfied.
It is the nature of water
to want to be somewhere else.

Everywhere we look:
the sweet guttural swill of the water
tumbling.
Everywhere we look:
the stone, basking in the sun,

or offering itself
to the golden lichen.

It is our nature not only to see
that the world is beautiful

but to stand in the dark, under the stars,
or at noon, in the rainfall of light,

frenzied,
wringing our hands,

half-mad, saying over and over:

what does it mean, that the world is beautiful—
what does it mean?

-- Mary Oliver, from Gravel