I. You Know More Than You Can Tell

"I shall reconsider human knowledge by starting from the fact that we can know more than we can tell."

1. Polanyi delivers a series of lectures at Yale, later published as a slim book: The Tacit Dimension. This is the opening line.

You recognize a face. You can pick it out from a thousand. But you can't say how. You can't produce a list — the angle of the nose, the distance between eyes, the arc of cheekbone — and say "that's why I recognized you." Your knowing exceeds your words.

You ride a bicycle. You can do it. But you can't precisely describe what your body is doing. Merleau-Ponty, in the previous essay, said the body knows before concepts. Polanyi draws the line here: what the body knows but concepts can't say is not the residue of knowledge. It is the foundation.

Everything you can say rests on everything you cannot.

You say "the earth revolves around the sun." This is an articulable proposition. But for this proposition to mean anything, it depends on things you can't articulate — your intuition of "revolving," your bodily sense of space, your pre-verbal understanding of motion. Remove those inarticulate parts and the proposition becomes a string of meaningless symbols.

II. From Chemistry to Philosophy

Polanyi was an unusual man.

Hungarian Jew. Spent years in Berlin as a physical chemist, researching crystal structures and reaction kinetics. A first-rate scientist — not "decent," genuinely important.

Then he turned.

He lived through two world wars. He watched European civilization collapse. He asked himself: why? Why did we destroy Europe?

His answer: because of a false conception of knowledge.

Positivism told us: only what can be explicitly stated, objectively verified, counts as knowledge. Everything else — intuition, faith, commitment, personal experience — doesn't count. This conception of knowledge expelled the deepest layers of human experience — moral judgment, aesthetic sense, the search for meaning — from the domain of "knowledge."

If these don't count as knowledge, they have no authority. If they have no authority, any trampling of them can be rationalized — because what you're trampling is merely "subjective feeling," not "knowledge."

Polanyi said: positivism is not just a philosophical error. It is a spiritual catastrophe. It dismantled the foundation on which humans resist evil. Because that foundation — moral intuition, aesthetic judgment, respect for persons — is entirely "inarticulate knowledge." Positivism declared the inarticulate doesn't count. The foundation collapsed.

III. Subsidiary and Focal Awareness

One of Polanyi's core concepts: subsidiary awareness and focal awareness.

You are reading this essay. Your focal awareness is on the meaning of the words. But your subsidiary awareness is doing other things — your eyes scan letter shapes, your hand rests on the phone or the desk, you feel the pressure of the chair, you vaguely register sounds in the room. You can't articulate this subsidiary awareness — because the moment you turn attention to it, it becomes focal, and what was focal becomes subsidiary.

You can't see focal and subsidiary at the same time. You always attend from the subsidiary toward the focal. The subsidiary is what you attend from. The focal is what you attend to.

Riding a bicycle: focal is the road. Subsidiary is every micro-adjustment your body makes — balance, pedal force, directional fine-tuning. You can't focus on the adjustments — the moment you do, you ride badly.

Recognizing a face: focal is the person. Subsidiary is all the facial features — but you aren't looking at features, you are looking through features at the person. If you focus on the nose, you lose the person.

Polanyi says: all cognition has this structure. You always attend from what you can't articulate toward what you can. Subsidiary first. Focal second. The inarticulate first. The articulable second.

IV. Gathering Seventeen Essays

Now look back at the preceding seventeen essays.

Comte said: only the articulable counts as knowledge. Only the observable, verifiable is genuine knowledge. The inarticulate — intuition, aesthetic sense, belief — doesn't count.

Polanyi says: the complete reverse. Everything articulable is built on the inarticulate. What Comte declared doesn't count is precisely the foundation of all knowledge.

Popper said: only the falsifiable counts as science. Polanyi says: every scientific discovery starts from something unfalsifiable — that intuition of "something is here," how do you falsify that?

Dirac's equation arrived before observation — Polanyi would say: the equation could arrive first because Dirac's aesthetic sense (subsidiary awareness) guided his mathematical reasoning (focal awareness). The aesthetic sense is inarticulate.

Qu Yuan's poetry produces no propositions — but it produces direction. Direction is inarticulate knowledge. You know which way to walk but can't say why.

Fichte's "I" — that "I" is itself inarticulate. You cannot fully describe in language how "the I posits itself" happens.

McClintock's "feeling for the organism" — sixty years of bodily immersion compressed into a feeling. Inarticulate. But it discovered jumping genes.

Weil's attention — the "how" of attention is inarticulate. You can't give someone an instruction manual titled "How to Have Attention."

Thatcher closed the door — but in the thinking process before closing, why were certain alternatives excluded? The final step always contains an inarticulate judgment.

Nāgārjuna dismantled even the floor — but what remains after dismantling, you can't say what it is. You can only call it "empty" — but "empty" is also just a provisional name.

Woolf's "moment of being" — when the cotton wool tears at that particular instant, why that instant and not another? Inarticulate.

Yukawa's meson — where did the picture of "two people tossing a ball" come from? From Zhuangzi? From intuition? Inarticulate. But it predicted a particle.

Arendt's not-thinking — where is the boundary between thinking and not-thinking? The "knowing" that you know you're thinking — itself inarticulate.

Murdoch's kestrel — why did that particular bird interrupt your self? Inarticulate. But it did.

Khaldun's asabiyyah — how do you "feel" a group's cohesion? Inarticulate. But enter a cohesive group and you know.

Vygotsky's scaffolding — how does the hand holding the bicycle seat know when to let go? Inarticulate. But the hand knows.

Strawson's relaid floor — how does he know this floor is "good enough"? Inarticulate. But the foot on it knows.

Merleau-Ponty's body — how does your hand know how to pick up a cup? Inarticulate. But the hand knows.

Seventeen essays. At the core of each, something inarticulate. Polanyi draws the line: that inarticulate thing is not residue. It is foundation.

V. The Cognitive Cycle

But Polanyi is not merely saying "the inarticulate is important." He is saying something deeper.

Cognition is not a prior affair. Nor a posterior affair. Cognition is the joining of prior and posterior.

Comte's error wasn't "valuing the posterior." The posterior isn't wrong. Observation isn't wrong. Data isn't wrong. Comte's error was "posterior colonizing prior" — using posterior standards to rule prior, declaring prior nonexistent.

But the reverse doesn't work either. You can't have "prior colonizing posterior" — wielding a prior framework to trim all experience, discarding everything that doesn't fit. That is another kind of closure.

Cognition is a cycle.

Posterior explores. You observed. You gathered data. You encountered the world. This is posterior's contribution. Posterior gives you raw material.

Prior synthesizes. You extract patterns, direction, feeling from that material. This is prior's contribution. Prior gives you a map.

Then prior guides. You take the map back to the world. You know where to look. Prior gives posterior direction.

Then posterior explores again. You observe in the new direction. You find something new — something not on the map. Posterior corrects prior.

Cycle. Round after round. Posterior explores → prior synthesizes → prior guides → posterior explores → prior re-synthesizes → ...

This is cognition. Not prior above, posterior below. Not posterior above, prior below. Both on the same plane, turning. One explores, one synthesizes. One guides, one corrects.

McClintock is the living proof. She spent decades with maize (posterior exploring). Her body extracted a "feeling" from it (prior synthesizing). That feeling guided her to look where others didn't (prior guiding). She saw jumping genes (posterior exploring to a new discovery). Then her discovery rewrote the entire framework of genetics (new posterior correcting old prior).

Dirac too. He studied masses of physics and mathematics (posterior exploring). His aesthetic sense extracted an intuition about symmetry (prior synthesizing). That intuition guided him to write the equation (prior guiding). The equation yielded negative-energy solutions (posterior exploring to new territory). The positron was found (new posterior confirming and correcting prior).

Every discovery is this cycle completing one revolution.

VI. Another Meaning of "We Know More Than We Can Tell"

Back to the opening sentence.

"We can know more than we can tell."

This is usually understood as: some knowledge is inarticulate. Tacit knowledge. Bodily knowledge. Intuition.

But after seventeen essays, the sentence acquires a deeper meaning:

"What you can't tell" is not the residue of your knowledge. It is the source of your knowledge. It is the interface where posterior exploring and prior synthesizing convert into each other. Your body extracts a feeling from experience — that feeling is inarticulate — but it is precisely that feeling which guides where you look next.

Inarticulate knowledge is the pivot of the cognitive cycle. Without it, posterior and prior disconnect. You've observed a heap of data but don't know what to think. Or you have a theory but don't know where to look. It is the inarticulate thing — intuition, feeling, directional sense — that joins them.

Polanyi calls this "Personal Knowledge." Not "subjective" knowledge — "subjective" implies unreliable. "Personal" knowledge — knowledge that can exist only by passing through a living person, through their body, their experience, their judgment.

Nobody can ride a bicycle for you. Nobody can feel genes moving for you. Nobody can hear beauty in an equation for you. These are personal. But they are not "subjective" — the positron really exists, jumping genes really exist, the bicycle really holds under your body.

Personal knowledge does not oppose objective knowledge. Personal knowledge is objective knowledge's foundation.

VII. Direction Without Destination

Kant proposed a concept: purposiveness without purpose (Zweckmäßigkeit ohne Zweck).

Applied to aesthetics — a flower appears to have a certain "purpose," but you can't say what that purpose is. It has direction but no destination. It is heading somewhere, but that somewhere has no name.

Polanyi's tacit knowing has this structure. You know the direction. You can't name the destination.

McClintock knew genes were moving — but in the 1950s she didn't know the molecular mechanism of "moving." She had direction without destination. Direction arrived first. Destination came twenty years later.

Qu Yuan knew which way to walk — "the road ahead is long and winding; I shall search high and low" — but he didn't know where he would end up. Direction present. Destination absent.

The entire cognitive cycle runs this way. Prior gives you direction. Posterior gives you destination (or gives you a new direction, and you keep walking). You can't collect data without direction — that's called groping in the dark. You can't declare direction without data — that's called building castles in the air.

The space between direction and destination — that is where tacit knowledge lives.

VIII. The Bridgehead

When Polanyi arrives, you don't notice him.

Not because he's unimportant. Because he looks too ordinary. A medium-built old man. Unremarkable clothes. None of Fichte's urgency, Thatcher's heels, Nāgārjuna's stillness, Qu Yuan's wet robes.

He steps onto the bridge. He doesn't look around. He doesn't search for a spot. He walks directly toward — you don't know where, but he does. He has direction. No destination. But direction.

He passes Comte. Doesn't stop. Doesn't rebut. Just walks past. As he passes, his foot lands on the grout Comte poured. Beneath the grout, cracks. He knows. He doesn't need to say.

He passes Popper. Popper is drawing a line. Polanyi doesn't cross the line. He walks on it. Both sides are his. The falsifiable on this side. The unfalsifiable on that. He doesn't choose. Both sides are knowledge.

He passes Dirac. They exchange a glance. Dirac's aesthetic sense — that inarticulate thing — Polanyi knows what it's called. It's called tacit knowing. The equation is focal awareness. The aesthetic sense is subsidiary. You attend from beauty toward equation. The interface between direction and destination is right here.

He passes McClintock. She's crouching, looking at corn. He crouches for a moment and looks. Not at the corn. At how she looks. Her posture, her focus, the interface between her body and the maize — this is personal knowledge. Nobody can do this for her.

He passes Weil. Weil stands there. Empty. Polanyi glances at her. Attention — the purest form of subsidiary awareness. You've emptied the focal. Only the subsidiary remains. Only the "from which" you attend. Weil reached the limit of subsidiary awareness.

He passes Vygotsky. The child beside Vygotsky is walking now. Polanyi smiles. Scaffolding — another mode of tacit knowledge transmission. Not through language. Through the body. Through the hand. Through being together.

He passes Strawson's relaid floor. His foot lands on it. The floor isn't perfect. But the foot on it knows: good enough. That "good enough" judgment — inarticulate. But the foot knows.

He passes Merleau-Ponty. Between them, no dialogue is needed. Merleau-Ponty says the body knows before concepts. Polanyi says we know more than we can tell. Same thing. Two ways of saying it.

He walks to the very back of the bridge.

He turns to face everyone.

He says one thing. Not something deep. Not a new theory. A sentence you already knew but had never heard quite this way:

"Everything you can say — Comte's regularities, Popper's line, Dirac's equation, Strawson's floor — all of it is built on what you cannot say. The inarticulate is not residue. The inarticulate is foundation. Your knowledge is never yours alone. It passes through your body, your experience, your judgment, your relationships with others. It is personal. But personal does not mean subjective. Personal is the foundation of objective."

Then he says one more thing — not his own words, but a sentence that grew from seventeen essays' arc:

"Don't let the posterior colonize the prior. Don't let the prior colonize the posterior. Posterior explores, so that prior can synthesize. Prior guides, so that posterior can find direction. This is a cycle. A cycle of understanding and knowledge. You are inside this cycle. You have never been outside it."

He is finished.

He takes something from his pocket. Something small. You can't quite see it. Perhaps a crystal — he did crystallography. Perhaps a button. Perhaps a grain of sand. It doesn't matter. What matters: he is holding it, you can't see its details, but you know it's in his hand.

Inarticulate. But there.

He extends his hand. Palm up. The thing sits in his palm.

You come.^[1][2]

Han Qin (秦汉) · @hqinjarsy · Great Lives