Somebody shows you how. You get on, you fall off, you get back on. You do that for a while and one afternoon you're riding, and after that you can't easily explain what changed, and you never lose it. That sequence is set out as a formula, and the formula is meant to cover a great deal more than bicycles:
Method + Practice Effort + Time + Experience = Kung-fu Results1
Kung-fu here isn't martial arts. It's the general word for any capacity produced by training — meditative attainments, physical transformations, psychic abilities, the lot.2 And all of it, including the states the contemplative traditions treat as remarkable, is said to come out of the same four inputs as ice skating.
The reach is stated rather than implied. It's called the scientific process behind training athletes, solving hard problems, making scientific breakthroughs, and cultivating any special skill at all.3 So one production function covers the sprinter, the researcher, the cellist and the meditator. Whatever they're building, they're building it the same way, and the differences between the fields are differences in the method term rather than in the mechanism.
What that buys is a genuine demystification. Contemplative attainment stops being a different kind of event — a gift, a grace, a sign of election — and becomes something a person produced by doing a specific thing repeatedly over enough time. The corpus's own conclusion follows immediately: attaining kung-fu is not anything special, and anyone who tries hard enough and trains consistently can reach it.4
Look at what's on the left-hand side and the demystification gets sharper.
Method you can be given. Practice effort you can decide to spend. Time passes on its own. Experience accumulates from the first two — including the falling off, and that's why it's a separate term rather than a synonym for time.
There is nothing on that side that has to be granted. No merit term, no grace term, no term for karmic endowment or a teacher's blessing. Which means everything on the right-hand side is manufacturable by a determined person, and that's the whole force of the equation. It's also why the equation is deflationary rather than encouraging in its home context. If a state can be manufactured, reaching it tells you the manufacturing worked and nothing else.
The equation sits in the middle of a passage about three cases. A condemned prisoner who balanced a lamp on his head for three days to avoid execution. Olympic athletes. And a man locked in a room and told to awaken or die. The prisoner's concentration was real and it was produced exactly this way — a method, enormous effort, a fixed duration, and a man learning as he went.5 And it was not the settled state, not a low grade of it, not on the ladder at all.6
So the equation has a hard boundary. It produces every capacity you can train, and the thing the tradition is actually after sits outside it — because that isn't a capacity. Prajñā is not on either side of the equals sign, and no amount of the four inputs generates it. Which raises the obvious question the corpus never quite answers: if the real thing can't be manufactured, what is all the training for? The nearest thing to an answer elsewhere is that the work clears obstructions rather than builds the result — you're not making anything, you're removing what's in the way, and removal is trainable.
The same structure shows up wherever a field has a trainable proxy and an untrainable target, and it explains a specific recurring frustration. A person can put the four inputs into writing and become genuinely excellent at sentences. Into research and become excellent at method. Into music and become excellent at the instrument. All of that is kung-fu, all of it is real, and none of it is why anybody entered the field. The taste, the question worth asking, the thing worth saying — those aren't outputs of the equation. The years don't produce them on a schedule.
What the equation does explain is why the training still has to happen. Nobody has the untrainable part available without the trainable part underneath it. The prisoner's failure wasn't that he trained; it's that training was all he did, under duress, aimed at a lamp.
The strongest evidence that this production function is generic rather than human comes from two lines the corpus quotes elsewhere, and they're placed as a pair.
An ape that learns concentration is born in a heavenly realm. A little girl, with a moment's thought, enters the door of the Way.9
Take the ape seriously. It has no doctrine, no teacher it can question, and no wisdom available to it — and it can supply method, effort, time and experience, which is the whole left-hand side. The equation runs, and it produces a real outcome: a heavenly rebirth, which is a genuine result in this cosmology rather than a consolation. The corpus confirms the generality directly: animals can also cultivate states of samādhi, though the animal mind is described as having lower clarity than the human one.10 So the four inputs work outside our species.
And the girl is the control. She gets the untrainable half in a single moment with no training at all — the one thing the equation cannot produce at any duration. One side of the pair shows the formula working without wisdom. The other shows wisdom arriving without the formula. Between them, the two are separate systems — which is what the whole page rests on.
Take something you're trying to get better at and split it into the two halves, honestly. Write down what part of it is genuinely a capacity — something where more method, more effort and more time reliably produce more of the thing. That's the kung-fu half. Train it without romance. The equation says it will come, on a schedule roughly proportional to the inputs, and it doesn't need you to believe anything.
Now write down the part that isn't. The judgement, the seeing, whatever it is in your field that separates a competent practitioner from one worth reading. You can't put hours directly into it, and that everyone who tries ends up putting the hours into the first half and hoping.
Then the useful question, which is the only one this page can hand you: what does the trainable half remove? For the meditator it removes the obstructions that make the other thing unavailable. If you can name what yours clears, the training has a purpose that doesn't depend on it producing the target. If you can't, you may be an athlete with a lamp on your head.
The equation isn't introduced as a piece of theory. It arrives immediately after two stories about people threatened with death, and the placement is doing the argument. The order runs like this. The Buddha claims concentration can accomplish anything. A king tests it on a condemned man and it holds. An emperor applies the same pressure to a monk and gets an awakening instead. And then the equation, followed by ice skating.7 Read as a sequence, the formula is the debrief. Two extreme cases of the four inputs at maximum intensity come first. Then the passage generalises: this is what was happening in both, it's what happens on a bicycle, and it isn't mysterious. The prisoner had a method, overwhelming motivation, three days and rapid learning. He got exactly what the formula predicts.
The placement also explains the ordinary examples in the middle of a book about samādhi. Bicycles and ice skating are chosen because they are unimpressive, and that is the point being made about the prisoner's three days. What the sequence quietly establishes is that the difference between the prisoner and the monk cannot lie in the equation's terms, since both maxed them. It has to lie somewhere the formula doesn't reach — which is the argument, delivered by arrangement rather than by assertion.
The formula is stated as though it were established and is offered without any source or derivation.8 🚩 SINGLE SOURCE. Naming it a scientific process is a rhetorical move rather than a citation of research on skill acquisition. The mechanism sentence for filing here: this cannot be understood without both skill-acquisition and contemplative stage theory simultaneously, because the two are said to share one production function and to diverge only over whether its output is worth having.
A real tension: the equation makes all attainment mechanical and reproducible, and the corpus elsewhere insists that finding a genuine teacher requires merit, and that merit determines what you can reach. Merit is not a term in the formula, and the two accounts of what limits a practitioner don't meet.
Open: if the trainable half clears obstructions rather than building the result, the equation should have a subtraction on the right-hand side rather than a product. Nothing in the text works that through.
Take the equation as good news and practice becomes honest labour — no waiting for grace, no need to be a special kind of person, just inputs and time, the way anyone learns anything. Take it as the warning it's placed to deliver and the same sentence turns cold. Everything you can train is beside the point. So competence at the measurable half is not evidence about the half you care about, and accumulating more of it only makes the mistaken evidence more convincing.
Both readings are in the passage, sentences apart. The first is needed to justify asking anybody to practise, and the second to stop them mistaking practice for arrival. How a person holds both while sitting down tonight is never addressed.
Eastern spirituality — Concentration Without Samadhi. That page shows the boundary being enforced on a specific case: the prisoner produced maximal concentration and none of the thing that matters. The equation supplies what that case is missing — a reason the failure was structural rather than a shortfall of effort. He didn't nearly get there. He was running a production function whose output does not include the target, at full intensity, which is why more of it would not have helped.
Business — the trainable proxy problem. Any organisation that can measure a capacity will train it, and the equation says the training will work. That's the trap. The proxy improves exactly as promised, and the improvement gets read as evidence about the target. Sales training produces better sales technique on schedule; whether it produces judgement about which deals to walk away from is not on the same production function and not on any schedule. The equation's real gift to an operator is the question of which half a given programme is actually buying.
Sharpest implication: every input to attainment that a person can control appears on one side of this equation, and the thing the whole tradition exists to reach appears on neither — which means the relationship between practice and realisation is not causal in the way practitioners assume, and the corpus's own formula says so.
Generative questions: