Seeing requires a perception plus awareness
“Not seeing” is without either

If you are aware, you are connected to your mind. Awareness is living in ‘Now”. 
The moment awareness comes in. 
The concept of ‘Now” also in.
The moment of ‘Now’ invites mind.

The awareness of ‘now’ can help to stimulate the concept of perception. The perception is nothing but a fast reference of your conditioned mind to give a meaning. A meaning is a perception of the mind. When the mind disappears, perception disappears along with.
Awareness can slowly bring bliss when our awareness in the absence of awareness. You’re aware you’re not there with your mind.
Suppose you were able to renounce the perception arising from awareness. You slowly help the memory mind to sleep with no judgment and slowly you forget to see the perception with mind and this is so called awareness practiced by sages.
If your mind sleeps in your awareness and fails to create a perception means bliss in enlightenment. that is enlightenment!

“You cannot see my not-seeing because you are
seeing..”

If you’re seeing with your minds then you cannot see my not-seeing. My not-seeing is seeing without my mind. you cannot see my not-seeing with your seeing coz your mind will interpret my non-seeing by seeing and fail to understand my non-seeing.
Suppose, I admire the nature on hill station and by just admiring the bliss but
if you see me that i am experiencing the scenery compared with the one I saw with you in Switzerland. you failed to see my non-seeing by seeing me.

“Not seeing-my-not seeing
Not seeing-your-not seeing
is you..”

If you too see with no mind. Then no comparison, it leads to no perception. 
Now
You’re-not-seeing in seeing my-not-seeing. hence you’re experiencing bliss and  
We both are experiencing the same bliss of not-seeing 
this helps you to not-seeing the one you saw and leads to you in you..