Why is it not yourself?

The Reading:

Shoyoroku - Case 88: "Non-Seeing" in the Ryogon Sutra [1]

The Ryogon Sutra says, 
  "When I don't see, why do you not see what I do not see? If you argue that
   you see what I do not see, that is of course not what I do not see. If you
   do not see what I do not see, then it is quite natural that it is not a
   thing. Why is it not your self?"

Discussion:

I'm reminded of Ikkyū from yesterday:

can you face me
and know nothing 

Where is all this knowing going to take us?