An inquiry into experience, the world, and the construction of the self through cognitive science and Buddhist thought.
If someone told you that you have never truly seen the world directly in your entire life—not as a metaphor, not as a philosophical game, but as something modern science increasingly suggests—most people's first reaction would probably be: that can't be true.
Every morning, we wake up, open our eyes, and there it is: the ceiling, the bedside table, the tree outside the window. Everything seems solid, definite, unquestionable. Close your eyes, and it seems to remain there. Leave the room, and it seems to remain there too. This is the basic assumption most people have about the world: out there exists an objective, complete reality, and the brain, like a faithful camera, records it as it is.
The assumption is so natural that it is almost never questioned.
But consider a small thought experiment.
The text you are reading appears as black letters on a white background. The "white" seems to be on the screen, and the "black" seems to be on the screen too. But from the standpoint of physics, the screen contains neither "white" nor "black" as they are experienced. What the screen emits is electromagnetic radiation within a certain wavelength range—roughly a small segment of the spectrum between 380 and 750 nanometers. Electromagnetic radiation itself has no color in the phenomenological sense. No physical instrument measures subjective whiteness itself; it measures properties of light, such as wavelength and intensity. "White" is a subjective experience generated in consciousness when the visual system receives a particular combination of wavelengths.
In other words, the whiteness we experience is not simply lying there on the screen, waiting to be picked up intact. It is the result of the visual system processing an external physical stimulus.
Color being subjective may be acceptable. But what about shape? A table is rectangular, a cup is round—surely that is not something the brain simply makes up.
How does the judgment that a cup is "round" arise? Light reflects off the surface of the cup, enters the pupil, lands on the retina, and stimulates a set of photoreceptor cells. At that point, there is still no "roundness." The photoreceptors convert light into electrical signals. Those signals are then processed through retinal circuits, and the output is carried by retinal ganglion cells into the optic nerve. At that stage, there is still no "roundness." These electrical signals travel along the optic nerve into the visual cortex, where they pass through layer upon layer of processing—edge detection, contour extraction, curvature computation—until finally, in consciousness, there appears "a round cup."
This is not to say that the cup lacks any objective structure related to roundness. It is to say that the "round cup" appearing in experience is not the object's properties entering the mind in raw, unprocessed form. It is a perceptual result formed through the brain's organization, integration, and interpretation of incoming signals.
There is an easily overlooked fact here: the brain does not directly encounter light, sound waves, or any other object in the physical world. It sits in a dark, sealed skull, and the only thing it receives is electrochemical signaling transmitted through the nervous system. From those signals alone, it constructs an entire experiential world: color, shape, sound, texture, temperature, smell.
The brain is like a black box. It does not access the world "out there" directly. It remains only indirectly coupled to reality, through signals about reality. And from those signals, it infers what the outside world is probably like
Of course, this is not a new problem. From Plato’s cave to Kant’s thing-in-itself, philosophy has long returned to the same question: what we encounter may not be the world as it is in itself, but the world as it appears to us.
Someone might object: even if that contact is indirect, so what? As long as the inference is accurate enough, isn't that good enough? Human beings can walk without running into walls. We can catch a ball thrown toward us. If the brain's inferences are sufficiently precise, what practical difference is there between that and "seeing directly"? The problem is that the brain is not merely passively inferring from incoming signals.
In recent years, predictive coding has become one of the most influential ideas in cognitive science. This idea suggests that the brain does not operate primarily through a purely bottom-up sequence of "receive signal → process signal → generate experience." On the contrary, its operation is to a large extent top-down. The brain first generates a prediction about the world based on prior experience, and then uses incoming sensory signals to test and revise that prediction.
Walk into a familiar kitchen. Before you have carefully inspected every detail, the refrigerator, stove, and sink are already "there." Not because the eyes have instantaneously scanned every object in full, but because the brain has already formed a model of what a kitchen is usually like, based on countless previous encounters. Sensory input is not always starting from zero and telling you what is present. Much of the time, it functions more as a way of constraining, correcting, and updating an already existing prediction. As long as everything fits expectation, people often barely notice the details. Only when something conflicts with the prediction—say, an unfamiliar object suddenly appears on the stove—does attention get recruited, because a prediction error has occurred.
This means that everyday experience is not simply built up from the outside in. It depends to a large extent on predictive models continuously generated by the brain, while sensory data constantly constrain and correct those models. We think we are directly seeing the world, but much of the time what we are actually seeing is the brain's best guess, based on past experience, with external input pulling that guess back toward reality.
The neuroscientist Anil Seth calls this a "controlled hallucination." In a certain sense, waking experience as a whole is a model actively generated by the brain, continuously calibrated by sensory data.
At this point, an obvious objection appears: if experience is largely constructed, why do most people seem to inhabit roughly the same world? The answer is that construction does not mean arbitrariness. Human beings do not invent reality from nothing. We live under the constraint of the same external environment, with broadly similar bodies, nervous systems, and evolutionary priors. On top of that, language, culture, and shared social life further stabilize experience into familiar objects and categories. So to say that the world we experience is constructed is not to say that each person lives in a private fantasy. It is to say that what we call "the world" is always already a model—one built under common constraints, and therefore overlapping enough to be shared.
No one has ever encountered the world in a completely unmediated way. What we encounter from beginning to end is an experiential world constructed by the brain under the constraint of external input.
At this point, the question is no longer merely scientific. It begins to touch a much older one: if what human beings live in is not first of all "the world itself," but an organized world of experience, then are suffering, attachment, fear, and even the sense of "I" also part of that same constructive process?
This is precisely where Buddhism becomes concerned.
It does not begin by asking what the external world is made of. It turns instead toward experience itself: how seeing becomes "seeing," how feeling becomes pleasure and pain, how a thought gets recognized as "my thought," and how attachment quietly grows on top of all this. In other words, Buddhism is not only analyzing the world. It is analyzing how the world appears to a subject, and how experience becomes organized into the felt reality of "I am having this experience."
From this angle, Buddhism and modern cognitive science are not doing the same thing. There is a saying often repeated in Chinese-speaking circles: "By the time scientists struggle all the way to the top of the mountain, Buddhist masters have already been sitting there for a long time." The line is obviously exaggerated, and it can easily mislead people into imagining Buddhism as some kind of advanced version of science. But it persists for a reason. The two do meet, from different directions, at a few adjacent questions. What we directly encounter is never simply the world itself, but a world already constructed, interpreted, and organized in experience. The difference is that cognitive science is concerned with how such construction happens, whereas Buddhism is more concerned with how human beings misperceive, cling within, and suffer through it.
If modern cognitive science makes us suspect that the world we experience is not the raw, unprocessed presence of external reality, then Buddhism asks the next question: how exactly is this experiential world put together? And especially: how does that "I" that keeps saying "I see," "I think," "I am hurt" come into being?
Take a simple example. Someone says something. At first, it is only a sound being heard. But almost in the same instant, a layer of discomfort has already arisen. Then that discomfort is quickly identified as something: this is an insult, this is contempt, this is directed at me. Immediately afterward, the whole system is set in motion—you want to strike back, explain yourself, withdraw, replay the sentence again and again, prove that you were not wrong, perhaps even rehearse your next response in your head.
The whole sequence happens so quickly that most of the time we end up with only a finished conclusion: he said something and it hurt me.
But what Buddhism wants us to see is not that simplified conclusion. It wants us to see the whole chain of processes that completed themselves almost instantaneously in between: how a sound becomes a feeling, how a feeling becomes an offense, and how an interpreted experience immediately grows into defensiveness, aversion, attachment, and suffering.
The classical Buddhist way of analyzing such a process is through the five aggregates—skandhas.
The word "aggregate" itself means a temporary assemblage. It does not refer to five hidden entities behind experience. It means that what we ordinarily take to be the complete, unified, continuous reality of "I am experiencing the world" is, on closer inspection, a temporary gathering of several different processes.
There is form (rūpa): the body, the sensory faculties, and the object-side of experience—color, sound, heat, cold, pressure, and so on.
There is feeling (vedanā): the pleasant, unpleasant, or neutral tone that accompanies experience the moment it appears.
There is perception (saññā): the act of identifying, labeling, classifying, naming—cutting a flowing field of experience into "this is praise," "this is a threat," "this is directed at me."
There is volitional formations (saṅkhāra): intentions, impulses, reactive tendencies, habitual patterns—the forces that make one want to approach, avoid, grasp, resist.
And there is consciousness (vijñāna): the discriminative awareness by which all of this is registered and experienced.
Once experience is broken down this way, the apparently seamless reality of "I am experiencing the world" begins to loosen.
Experience no longer looks like a fixed subject standing opposite the world and taking reality in as it is. It looks more like the result of multiple processes unfolding together: bodily contact, feeling tone, recognition, habit, reactive momentum, ongoing discrimination. The reason it so strongly seems as though "there is an I in here" may not be because a stable, independent controller is actually hidden somewhere inside, but because these processes are so tightly interwoven and continuous that the impression of a stable center becomes almost impossible to doubt.
So when Buddhism speaks of no-self, it is not saying that people do not exist, nor that experience is unreal. It is pointing to something more precise: if you look carefully, it becomes difficult to find within experience any independent, enduring, unchanging entity that can be securely identified as "I." What you find instead are interdependent, continuously shifting processes, while "I" looks more like a solidified interpretation of those processes—an automatic act of appropriation.
And then the question moves one step further. If experience itself is processual, and if the self is also something constituted within process, then why do these processes unfold the way they do? Why do they so quickly become attachment, fear, grasping, and suffering?
The Buddhist answer is dependent origination—pratītyasamutpāda.
Dependent origination claims: nothing stands on its own. When conditions are present, a phenomenon arises. When conditions change, it changes. When conditions disperse, it fades. This is true of external events, of inner thoughts and emotions, and even of the very sense that "I am here."
At any given moment, bodily state, sensory input, traces left by past experience, present modes of interpretation, and habitual reactive tendencies gather in a particular configuration, and the feeling of "I" becomes vivid. Change the conditions, and that feeling changes too. In deep sleep, it has not gone somewhere else; rather, the conditions that support its appearance have temporarily loosened. On waking, those conditions gather again, and the familiar self returns.
From this perspective, the self is more like a phenomenon that reappears whenever the relevant conditions are in place. Like fire: fire is not a thing hidden inside the wood, waiting for the right moment to leap out. It is a process that appears when fuel, oxygen, and temperature come together. When the conditions disperse, the fire goes out. It has not "gone" anywhere, because it was never an independently existing thing to begin with.
Placed together, no-self and dependent origination make the human condition look somewhat clearer. We live in an organized world of experience, and much within that world—including the very "I" that seems to be having it all—looks more like a temporary process arising from conditions than like a solid, independent, permanently existing entity.
What truly gives rise to suffering is often not these processes themselves, but the way they are mistaken for something more substantial than they are: the impermanent is taken to be something that ought to last; the flowing is taken to be fixed; the conditioned is taken to be simply given; and what is not owned by any true controller is seized as "my experience," "my emotions," "my pain." Attachment, fear, aversion, and possessiveness often begin to grow from exactly this point.
Seen from yet another angle—from evolution and neurobiology—what Buddhism means by suffering becomes more concrete.
Evolution is not concerned with whether an individual feels fulfilled or happy. It is concerned with survival and reproduction. The human reward system is not built to let us rest in satisfaction for long. This helps explain why desire is so often restless. What grips people is often not the brief pleasure that follows attainment, but the momentum of waiting, approaching, almost getting. Before attainment there is agitation; afterward the feeling fades, and attention shifts again. When Buddhism says that craving and clinging lead to suffering, this is one way to understand it: the problem is not only that people fail to get what they want, but that the mechanism of pursuit itself rarely ends in ease.
For those who have genuinely tasted meditative bliss, the satisfactions of ordinary desire can begin to feel crude. That pleasure is usually mixed with tension and collapse. It feels less like peace than like a temporary easing of lack.
Suffering in Buddhism is not merely pain. It is a deeper unsatisfactoriness. A mind shaped by evolution and pulled outward by the reward system struggles to come to rest. It keeps searching for the next object. Suffering is built into the structure of seeking itself.
However, conceptual understanding is not the same as transformation. A person may understand, at the level of thought, that experience is constructed and still find the self as solid as ever.
I once heard a teacher ask students to imagine a tiger entering the room. One student began describing it in detail—its body, its stripes, its face. Another simply ran. The point is: if a tiger is truly present in experience, analysis is not the primary response. Flight is.
Much of what passes for spiritual understanding remains at the level of the first student: description without transformation. One can speak fluently about no-self, conditioning, craving, prediction, and non-attachment, yet remain unchanged. If something is truly seen, it does not merely improve language. It changes how one lives.
This is where many contemporary forms of "Buddhism and science," contemplative psychology, or intellectualized spirituality can go astray. They can illuminate, but they also invite a substitution: intellectual understanding in place of direct seeing. Practice returns inquiry from theory to observation, from explanation to direct encounter. Only there can insight stop being a concept and become a change in one's relation to experience.
The point of Buddhism is not to add one more theory to the world. It is trying to make misperception visible. What arises dependently can change.
The world will still appear. Feelings will still rise and fall. Thoughts will still come and go. What may change is something quieter: once a person begins to see how these things arise and are taken up as "I" and "mine," the grip begins to loosen. And where that grip loosens, suffering may begin to lessen.