"Evocation - gentle rain falling" was inspired by the Tao Te Ching text from
the sixth century B.C. about the eternal oneness of the source of all things
(Tao) and its reflection in the myriad, material manifestations, or "the ten
thousand things." The circular ostinato at the beginning weaves its way
through a series of interruptions eventually leading to the third and
intensely rhythmic section which is in utter contrast to the opening
motives. This balance of opposites is the central theme of the book.

From the Tao Te Ching:

Once the whole is divided, the parts need names
There are already enough names.
One must know when to stop.
Knowing when to stop averts trouble.
Tao in the world is like a river flowing home to the sea.

If kings and lords could harness it,
The ten thousand things would naturally obey.
Heaven and earth would come together
And gentle rain fall.