For an idealist, this question is not especially difficult. The self exists independently of physical reality, and the observer is fundamental. Whatever the strengths or weaknesses of that position, it is not the one that interests me.
My question is different: what is it that sees through our eyes?
The obvious answer is, “It is you.” Yet that can’t be right. The eyes are biological sensors. They deliver information, whatever is behind doesn"t have eyes.
If we continue looking behind the eyes, we do not find another observer. We find only biological processes.
My intuition is that the brain consists of many biological commissioners. Each commissioner is capable of commissioning a complete account of the present moment—an account of the world, of the body, and of the self within that world. These accounts overlap, differ, reinforce one another, or conflict, but each is internally coherent enough to stand on its own.
There is no central editor choosing between them.
Instead, the accounts exist within the same neural economy. Those that fit most effectively with ongoing neural activity naturally become stronger. They recruit other compatible accounts, reinforcing one another through ordinary biological processes. Others gradually fade. This is not competition in the ordinary sense, because nothing intends to win. It is simply the consequence of how networks of neurons stabilise around coherent patterns of activity.
The account that becomes most stable is experienced as the present moment. A moment later, it becomes memory. The continuous succession of these stabilised accounts gives rise to what our experience
The important point is that there is never a single observer behind the eyes. There is only a dispersed process of biological commissioning, in which complete accounts are continually formed, strengthened, weakened, and replaced. The experience of “I” is not the author of these accounts. It is the account that, for the moment, has achieved the greatest coherence.
Perhaps truth is not even the primary criterion. The accounts that endure are ordinarily those that best anticipate what happens next. Their value lies less in faithfully representing reality than in generating successful predictions that guide future action.