In the End

         We exist for ourselves, perhaps, and at times we even have a glimmer of who we are, but in the end we can never be sure, and as our lives go on, we become more and more opaque to ourselves, more and more aware of our own incoherence. No one can cross the boundary into another - for the simple reason that no one can gain access to himself.

New York Trilogy
Paul Auster
1987
                                https://en.wikipedia.org/wiki/The_New_York_Trilogy