I have done the exercise.
I have seen out: sounds, images, flavors, smells.
I have seen in: something hearing sounds, viewing images, smelling... but what is that thing that is viewing, hearing...?
it is not my mind, she comes after the viewing, to interpret it and say: is a tree or a dog.
Before the mind there is someting like the wall in the Platoīs cave allegory,
the shadows need to "hit" the wall to exist, otherwise they canīt exist.
inside me there is something like a wall.
Sounds and images hit this wall to exist, othewise they canīt exist.