I’m late to seeing this thread - “what is it that sees?” - but I wonder if, the way the question has been put, we cannot ask the same question about “what is it that smells?”, or “what is it that tastes?”, or “what is it that hears or touches?” - correct? (After all, some people cannot see, because they are blind, so they rely upon other senses to make sense of the world).
In which case we could then ask: “what is that touches, tastes, smells, hears and sees?” Indeed - in addition to these sensual modalities, what is it that thinks and feels?
Isn’t it the brain (with its attached nervous system)?
But not our personal brain. It is the brain (and nervous system) that has evolved for millions of years - starting off in animals and then by degrees developing in hominids - which we subjectively (but mistakenly) assume to be our own personal property.
So, at the very least - although I’m not denying that there may be more to the question - it is this brain (with its attendant nervous system) that sees.
This broadens the question to include all brains: the brains of the most anonymous bird or rodent, even the brains of fish and insects!
So the question is then: what is it that is sentient (or capable of perception, of feeling) in all living creatures?
What is it about the brain (and nervous system) of any animal that brings about this capacity for sentience? - Right? Isn’t this the question?
Without the brain (and nervous system) there wouldn’t be any sentience, right? (Because there wouldn’t be any senses, or the organs by which sensations are processed as sensations).
But we could still ask: is there anything in our capacity for sentience that involves more than just the sensual modalities of perception?
This seems to be nobody’s question.
So how would we find out? Scientific explanations will not help us here, because science only deals with matter, and the brain and nervous system are wholly material.
So isn’t this where meditation must play a part? And it is in exploring the question of meditation that we can begin to call into question the apparent reality of an observer separate from the observed - right?
The senses are always responding from a particular brain (& nervous system) towards sensual objects that are perceived to be external to that particular brain. So here, in ordinary sense-perception, the observer and a separate observed has a functional relevance (e.g., a particular brain is not the tree it is looking at).
But psychologically, it is a wholly valid question to ask whether this observer-observed relationship still holds. That is: is the thinker separate from his thoughts? Is the see-er or experiencer of suffering separate from the experienced state of suffering that he sees?
If the see-er is not separate from the seen (psychologically speaking), then there is only a state of seeing (without a see-er) - right?
Then the question is: what is this state of pure seeing (without a see-er)?
But is there any way to talk about it from the ordinary point of view that still assumes a separation of the see-er from the seen?
If we cannot talk about it - because our question “what is it that sees?” still assumes this division - then how do we proceed?
I think we have to accept the possibility that the question “what is it that sees?” may be a wrong question. Seeing itself is important, not who or what sees.