The subject, seen as a whole, is of a man (representing me) lying on a barren plain before a wheatfield, with his head split open.  The point of view is from the top of his head.

  The subject is then roughly divided into the left hand side of the picture, [with] the thoughts made in his head represented as a maze;  and the right hand side, the view of the rest of his body.  The hands and feet are seen through the eyes, nose and mouth, tapering off into the distance and the outside world.