How can one point to one's consciousness? For example, I can point to my eye:

the eye itself;

I can point to an object of the eye:

a book;

But I cannot point to the eye-consciousness that arises based on the two.
From MN 28:


  If, friends, internally the eye is intact but no external forms come into its range, and there is no corresponding conscious engagement, then there is no manifestation of the corresponding section of consciousness. If internally the eye is intact and external forms come into its range, but there is no corresponding conscious engagement, then there is no manifestation of the corresponding section of consciousness. But when internally the eye is intact and external forms come into its range and there is the corresponding conscious engagement, then there is the manifestation of the corresponding section of consciousness.


Trying to point to one's consciousness is like trying to point at the wind. One can't really "point" it out. One can only point to its manifestation. How to point at the wind? When seeing a tree and its branches are shaking or feeling a breeze brushing against one's face, etc. Similarly, how to point out one's eye consciousness? By the fact that one's able to cognize the form object like a book, a table, etc..