Moving the eyes from the front of the face to behind the head.

"Moving the eyes
 from the front of the face
 to behind the head
 allows for the clear perception
 that one is not separate
 from the manifestation,
 but rather a part of it.
The space that fills the small pot
 is the same
 as the space that fills the large pot."

 - Lost Writings of Wu Hsin


(Thanks to the headless people for finding this pointer.)