What rises up appears bright
What settles down appears dark
Yet there is neither darkness nor light just an unbroken dance of shadows
From nothingness to fullness and back again to nothingness
This formless form
This imageless image cannot be grasped by mind or might
Try to face it
In what place will you stand?
Try to follow it
To what place will you go?
Know That which is beyond

From the Tao Te Ching, Verse 14