According to Osho, the Seer or Witness within is the ever-present knower—the subject that can never become an object. Whatever is known is not you; through neti-neti, all objects drop, and only the capacity to know remains. Self-knowledge is not seeing a thing but a silent recognition: when nothing appears, 'I am'—pure awareness, unfathomable yet undeniably present.
It’s like eyes trying to see themselves—you can’t; you are the seeing itself, and when thoughts and things fall quiet, what’s left is simply you, the silent awareness.