A tradition that has been running for a thousand years accumulates a particular kind of knowledge: not what works, which is hard to say, but what people keepdoing wrong. Two of those catalogues are printed back to back. The Śūraṅgama Sūtra lists fifty representative errors for people of high attainment, and Zen master Yung-ming summarised one hundred and twenty other miscellaneous errors which are exceedingly common in spiritual practice.1 A hundred and seventy failure modes, and the first of the two lists is specifically for the advanced.
Then he quotes Yung-ming's, and the striking thing about it is not its length. It's what the entries are made of:
Some mellow the spirit, nurture energy, and preserve naturalness. Some torture the body, mortifying the flesh, and consider that the ultimate path. Some cling to nongrasping and stand rooted in the immediate environment. Some suppress the wandering mind in quest of quiet meditation.1
Every one of those is a real practice. Nurturing energy is Taoist cultivation. Mortifying the flesh is asceticism. Suppressing the wandering mind is the whole of concentration training.
The errors aren't the absence of the methods. They're the methods, held wrongly.
The division between the two lists is worth pausing on because it says something the lists don't. The Śūraṅgama's fifty are for people of high attainment.1 They're the errors you become eligible for by getting somewhere — the demonic states and misidentifications that require a real attainment to be available at all. Yung-ming's hundred and twenty are exceedingly common. These are the ordinary ways.
Which produces an unusual shape for a body of practical knowledge. Failure has been mapped in far more detail than success, and mapped at two altitudes, with the advanced failures given their own dedicated catalogue. The framing of the second list, taken from its own closing line, is harsher than the contents warrant: one hundred twenty kinds of views and understandings characteristic of false cults. All of them have lost the source and turned away from the essential message.2 Read the entries and most aren't cults at all — they're sincere practitioners doing something reasonable slightly too hard.
Go through the list and a pattern emerges that the list itself never states. The errors sort into families, and the families are the useful part.
Excess of a good thing. Some torture the body, mortifying the flesh. Some suppress the wandering mind in quest of quiet meditation. Some get rid of feelings and negate phenomena in order to stabilize voidness.1
One half of a pair, taken alone. Some clear the mind and ignore matter, abiding as a result in a kind of celestial state in which it is hard to become enlightened. Some dwell on the absolute and lose the basic emptiness of the mundane.12 These are the body-only and emptiness-only errors this book names elsewhere as the two mistakes.
Terminal states mistaken for the goal. Some cut off consciousness and freeze the mind, experiencing an inanimate state in consequence.1 Inert stillness, which reads from inside as profound and is a dead end.
And the strangest category — the ones that fail by succeeding. Some stick by true explanation but develop literalistic views. Some drink the elixir of immortality yet die young.2 That last one isn't a metaphor about attitude. It's a flat report of practitioners who took the alchemical preparations and were killed by them — the same fatality noted elsewhere among emperors and Taoist adepts. In a list of doctrinal errors, one entry is a poisoning.
Four entries fold back on themselves. They're the most sophisticated things in the catalogue, and the shape they share is worth having:
Some cling to the nonclinging mind, learning imitation insight.2
Non-clinging is the instruction. Clinging to non-clinging is the failure, and it's invisible from inside because the content of what you are holding is the instruction not to hold.
Some conceive a sense of knowing but in doing so turn away from the essence of reality.2
This is the knowing-criterion — a registration of the state disqualifying it — appearing as one line in a tenth-century error list, four hundred pages away from where it's stated as the central test.
Some practice formless contemplation, blocking true suchness.2
The formless absorptions, used correctly, obstruct the thing they were for. That is the whole trap, in one line.
Some are so earnest about the principles of completeness that they develop an attitude of clinging attachment.2
Earnestness about the highest teaching, producing attachment to it. What all four share is that the failure is generated by correct practice rather than by deviation from it, which is why they can't be avoided by trying harder. Trying harder is the mechanism.
Don't read this list looking for the error you're making. That's the natural move and it doesn't work, because the entries describe things that feel like diligence from inside. Read it instead for the shape of your practice, and ask three questions the list keeps asking.
Am I doing one half of a pair? Almost every entry that names a failure of imbalance names the missing half. Body without emptiness, emptiness without body, absolute without mundane, clearing the mind while ignoring matter. Whatever you've been emphasising for the last six months, the list's method is to ask what you dropped in order to emphasise it.
Am I holding an instruction rather than doing it? Clinging to the nonclinging mind is the test case. Take the teaching you're most confident about and ask whether you would defend it — and how much. Defence is holding.
And what is the price of the thing I think is going well? Earnest about the principles of completeness and drink the nectar but turn it into poison both describe practitioners whose problem was the quality of their commitment. If nothing about your practice has cost you anything recently, you may simply be comfortable; if it has cost you a great deal, this list says that is not evidence either.
Then the practical ceiling on all of it, which is the list's own honest implication: a hundred and seventy failure modes can't be checked against individually. What the catalogue actually gives a practitioner isn't a checklist but a prior — the expectation that whatever they are currently doing has a named way of going wrong, and that it won't feel like going wrong.
The list's final entry is its best, and it's worth taking on its own:
Some are so earnest about the principles of completeness that they develop an attitude of clinging attachment; they drink the nectar but turn it into poison.2
Nothing has gone wrong with the teaching. The nectar is nectar. The transformation happens inside the person receiving it, and the agent of the transformation is earnestness — the quality every tradition asks for and no tradition warns about.
Set out what the entry is claiming. The practitioner has the highest teaching. They have it correctly. They care about it more than about anything else. And that caring converts the teaching, in them, into the specific thing it exists to remove.
Which makes it the general form of every recursive entry above it and of a great deal of this cluster besides. The semblance dharma is manufactured by a practitioner who knows exactly what the goal looks like and pursues it diligently. The state in the Śūraṅgama list is produced by excessive repression. The man who kept every rule for thirty years is the one who broke the discipline continuously.
In each case the failure is downstream of the virtue, not of its absence — and in each case there's no version of the practitioner trying harder that helps. What the entry doesn't do, and what nobody in this material does, is say what the alternative disposition is. Not caring is obviously worse. The list names the poisoning and leaves the reader holding the cup.
The nearest thing to an answer sits three entries above it: some stick by true explanation but develop literalistic views.2 The difference between the two might be that a literalist holds the teaching as a description of reality while a practitioner holds it as an instrument — but that's the vault's reading, and Yung-ming doesn't supply it.
There's a connection here that never gets made, and it's worth stating because it reframes both passages. The author of the hundred and twenty errors is named on this page as Zen master Yung-ming.1 The author of the Source Mirror and its ten questions is named three hundred pages later as Zen master Yen-shou. Those are the two halves of one name in the standard rendering — Yongming Yanshou, the tenth-century Chan master — and the two are never connected. A reader meeting both passages would have no reason to know they came from one person.
Once connected, the two instruments turn out to be a matched pair. The pairing is more useful than either alone.
The hundred and twenty errors is the negative instrument. It enumerates failure modes exhaustively and can't certify anyone.
The ten questions is the positive instrument. It asks what hasn't lapsed, what can't move you, what you can meet without fear — and, as that page notes, it also can't certify anyone, because a self-administered exam has no invigilator.
So one man produced a very long list of ways to be wrong and a very short list of ways to check, and neither yields a verdict. What they yield together is a working method: expect to be in the error list, and use the ten questions to find the first thing you can't honestly claim. That's the closest thing to a practical account of how anyone could know that this hub has produced, and it's assembled from two passages the book keeps three hundred pages apart under two names.
Two pieces of surrounding context change how the lists should be read, and neither is in the lists themselves.
The escalation. When someone meditates specifically to get ESP, astral projection, dream control or psychic abilities, it's even too kind to say these people are treading "outside paths," for practices that target these ends are called "devil roads" in cultivation. And then the sharper claim: even some realms of samadhi were considered devil roads in the Surangama Sutra because they resulted in superpowers and a great potential to be led astray.3
Realms of samādhi, classified as devil roads. That's the third distinct demotion of the absorptions in this build — images of emptiness, outside paths, and now devil roads — and it's the harshest.
The institutional response. He notes that esoteric schools make students study for twenty or more years before teachers will dare introduce them to the highest teachings, so that they don't take the information incorrectly.4
Read that against the error lists and it's not conservatism. It's a quarantine period, and its logic is exactly the semblance-dharma logic: a student who receives a description of the destination too early will manufacture it. Twenty years is what a tradition does when it knows its own highest material is dangerous in the hands of someone not ready, and has no test for readiness other than time.
Strongest support. The list is a primary catalogue from a named tenth-century master, and its internal structure — failures generated by correct practice rather than by deviation — is a pattern in the entries rather than a reading imposed on them.12 The recursive entries in particular couldn't have been produced by anyone who had not watched the failures happen.
The tension the source does not close. The list is framed as characteristic of false cults,2 and its contents are overwhelmingly the errors of sincere practitioners inside legitimate traditions. The frame and the material disagree.
A second tension. Practices aimed at psychic ends are called devil roads, and some realms of samādhi are reported as devil roads too.3 This book's principal measuring ladder is the samādhi sequence, and the classification is noted without comment.
A third, on attribution. The author of this list is named as Yung-ming and the author of the Source Mirror as Yen-shou without indicating that these are one figure. The connection stated on this page is the vault's, drawn from standard naming conventions; the source makes no such claim.
And on citation. The entire block arrives through Thomas Cleary's The Five Houses of Zen.2 The Śūraṅgama's fifty errors are mentioned but not quoted or located. [SINGLE SOURCE] on the fifty.
And the standing scope limit. The correct path these hundred and twenty errors deviate from is the ladder footnote 518 calls false stages.5
Open questions. Is there a positive curriculum anywhere in this literature of comparable detail to the failure catalogue — and if not, is that a gap or the correct shape for the field? And the twenty-year quarantine: was it ever measured against outcomes, or is it a rule that persists because nobody can distinguish a student it saved from one who didn't need it?
Against The Source Mirror's Ten Questions, the two pages are one author's matched pair and should be read together. That instrument asks what hasn't lapsed; this one enumerates what commonly goes wrong. Neither certifies anybody, and used together they produce the only workable procedure in this hub — assume you're on the error list, and find the first question you can't honestly answer yes to.
The convergence with Semblance Dharmas is exact and independent. Some cling to the nonclinging mind, learning imitation insight is the semblance dharma named in a tenth-century list, four hundred pages from where the term gets defined. Same phenomenon, two vocabularies, no cross-reference.
Read with This Is Not Sainthood, the two catalogues stack. That page's Śūraṅgama refrain warns against misreading spectacular states; this one enumerates a hundred and twenty ways to misread ordinary practice. Together they describe a tradition that expected error at every altitude and wrote it down. Against Samādhi States Are Images of Emptiness, the entry some conceive a sense of knowing but in doing so turn away from the essence of reality is the knowing-criterion arriving from outside this book entirely. The test is stated as original analysis in one chapter and quotes it as a single line of a Chan error list in another, without noticing.
A curriculum built out of what went wrong — Apprentice Yourself in Failure. That page's argument is that the productive apprenticeship is served in the failures — Ford working on every device he could get his hands on, learning the engine by way of what broke — and that a career is built by accumulating the specific knowledge that only failure supplies. Yung-ming's list is that method turned into a field's canonical text. What the pairing gives that neither side gives alone is a claim about when negative curricula appear: a discipline enumerates failure modes in this kind of detail precisely when its success condition is unspecifiable. Ford could not write down how to build a good engine in advance of building one, but he could accumulate what breaks. A contemplative tradition can't specify realisation — every page in this hub is another demonstration of that — but it can catalogue a hundred and seventy ways of not getting there, because those have observable surfaces and the destination doesn't. So the lopsidedness isn't a defect in the literature; it's the signature of a field whose target is undefinable and whose failures aren't — and the same signature should appear anywhere else that combination holds, which predicts detailed negative curricula in exactly the domains where positive instruction sounds vague.
One handshake. A second obvious candidate — a virtue producing the failure it was meant to prevent — is carried elsewhere in this cluster by the discipline and semblance-dharma pages, and would be restatement.
Sharpest implication. The last entry says the practitioner drinks the nectar and turns it into poison by being too earnest about it — which names the failure mode that no amount of sincerity, effort or correct teaching can protect against, and offers nothing in its place.
Generative questions.