"Plucking chrysanthemums along the eastern fence;
Gazing in silence at the Southern Hills;
The birds flying home in pairs
Through the soft mountain air of dusk -
In these things there are deep meaning.
But when we are about to express it.
We suddenly forget the words"
You can read more specifically about it here. And also Alan Watts mentioned in in an .mp3 file I have called Man In Nature. Deeply fascinating.