A light hidden in the folds of a valley.

Perhaps this image is something, perhaps nothing.
To give some clues I offer:
The following part of the Tao Te Ching
as translated
by Henry Wei in his book
The Guiding Light of Lao Tzu.

'Tao is hollow, yet its utility
Seems unlikely to reach the limit.
Profound indeed it is;
It seems to be the fount of all thing
Hence comes the name Mysterious Female.
The gateway of the Mysterious Female
Is the root of Heaven and Earth.
Continuous like a thread it seems to exist,
Its utility is inexaustible"