"You have heard the music of the man, but you haven heard the music of the earth.
You may have heard the music of the earth, but you may not have heard the music of the heaven!
The universe blows out a vital breath called the wind.
Sometimes it remain inactive, but one it becomes active, angry howls are emitted from ten thousand crevices.
Have you never heard them roaring?
There are crags and cliffs in the mountains; there are hollows and caves in the huge trees.
They look like nostrils, mouths and ears, like gouges, cups and mortars, and like pools and puddles.
The wind blowing past them makes sounds of the raring water, whistling arrows, scolding, breathing, shouting,
wailing, rumbling, and chirping.
One rustling sound is echoed by another.
A gentle breeze produces a faint response; a strong wind produces a gigantic response.
When the violent gust has passed on, all the hollows become silent again.
The music of the earth is the sound from all those hollows, while the music of the man is the sound from different flutes and pipes.
The music of the heaven, is varied, but it is the same wind that makes different hollows produce different sounds.
Each hollow produces its own sound; what else is there to emit the sound?"


Zhuangzi (c. 369 286 BC)