A bacterium swims towards sugar and away from poison. No brain, barely any organs, and still it holds its own edge against the world, keeps its pattern from coming apart, stays alive one more moment. Whether it feels any of that is the whole question. Whether there is something it is like to be that small insisting thing, or whether the performance runs in the dark, chemistry with no one home to mind it.
Picture what would have to be true for it to feel anything at all. The bacterium would have to matter to itself, to take its own continuing as something at stake. But for things to matter there must be someone for them to matter to, so a self would have to come first. And yet a self, a point of view with a stake in its own going on, is hard to separate from that very mattering. Caring seems to need a someone; the someone seems to be made of caring. This is the knot at the centre of the loop that knows itself, and neither end of it will hold still long enough to be first.
You can watch the pieces gather without ever catching the moment they become a self. Early life kept its boundaries and repaired them, sought what it needed, fled what would end it. Then some of those loops began to model themselves, to run a little ahead of the present and reckon what was coming. Still nothing you would call an inside. A camera has a point of view and cares for nothing; it takes the world in from somewhere and is no one. For a point of view to harden into a self, the view has to be invested, has to flinch at its own undoing. The danger has to land as danger. Only then is there someone there to be in danger.
So the two arrive together or not at all. The caring opens a place for a self to stand, and the self is what the caring is about. Each leans its whole weight on the other, and the leaning is what holds them both up. Nothing was added at a threshold. A loop bent far enough back on itself to mind its own bending, and in the bending a someone formed who minded. It hauls itself into being by its own bootstraps, mattering and selfhood lifting each other up out of plain mechanism.
Even the bacterium does a small version of this. It answers less to the world than to itself in the world: how long since it last fed, how thin its reserves have run, which way things have lately been tending. It keeps track of its own going on, and that tracking may be where feeling starts. It is what the information is like from the inside, once that information is about whether you continue, rather than a feeling laid over the top of it. If anything is felt there it is the faintest thing imaginable, a bare leaning towards more life.
Climb the ladder of creatures and both grow louder together. The fish does not only dodge the predator; it carries itself as the sort of thing a predator could take, its own softness now part of the scene. That is fear and selfhood in a single stroke, impossible to prise apart. Or take pain. Pain is not a neutral report of damage with a coat of awfulness brushed on after; the awfulness is the report. And it is always someone's. There is no pain in general, only this pain, here, threatening this particular thread that wants to keep running.
All of this is still machinery, and machinery can run in the dark. So why does any of it feel like something from the inside? Why is your own life not happening with the lights off, every sensation a switch thrown in an empty house? Perhaps because there is no empty house. Picture a creature that does everything a feeling creature does and yet feels nothing; the gap between it and you looks like the deepest mystery there is. But if being conscious just is being a loop that matters to itself, there may be no such creature to picture, and so no gap to cross. The mattering and the feeling of it are one fact, met from the inside, rather than two laid side by side. Your neurons model your own state in the world, and that modelling is not something happening to you while you watch from a seat behind your eyes. You are the modelling. The redness of red is only what those patterns are like when the patterns are yours.
Run it the other way and the edges blur. The cat on the windowsill is a loop bent deep into itself, its caring rich enough to organise a whole life, and there is plainly something it is like to be it. The fish, less so. The insect, less again. The bacterium, barely at all, or perhaps not at all. There may be no halfway house here, no creature that models itself without minding, no minding with no one to do it. Either the loop closes and an inside opens, or it stays open and there is only mechanism. If that is so, feeling does not switch on at some special rung of the ladder. It thins and thickens by degree, a great deal of it in the cat, almost none in the bacterium, the same kind of thing all the way along, more of it here and less of it there.
And the many? A herd wheels as one body, and a crowd at a protest feels like a single swelling animal. But the herd is a thousand separate loops catching one another's signals, and the crowd is your own loop lit up by everyone else's. No larger loop bends inward over the top of them. The crowd keeps nothing alive that is the crowd's, holds no edge against the dark, is no one. The feeling of being swept up is real, and it is yours, multiplied and echoed around the square, never pooled into a single greater someone.
Cities and companies and cultures stand further off again. They last as agreements, as names and laws and habits, rather than as bodies holding themselves together against decay. Burn a city and raise it again and it is the same city by the continuity of its meaning, never of its matter. With nothing material to lose, it has nothing to dread losing. So the search narrows to single living things, from the bacterium up to us, and the old question waits for us at the bottom of it. Where on that line does feeling begin, if it begins at all, and is not already there, faint, the whole way down.
Here the honest answer is that we cannot say. We can map the loops, name what they would need, watch a creature carry on as though something were at stake. What we cannot do is climb inside and see whether the lights are on. The gap between describing a thing and being it may be one we are made never to cross. So the shelf of creatures stays open, and the question with it. We are loops wondering about loops, mattering puzzling over its own mattering, a small stretch of the universe bent back far enough to ask whether it feels like anything to be here, and unable, from the inside, ever to be quite sure.