A monk asked Zhaozhou: “Does a dog have Buddha-nature?”
Zhaozhou replied: “Mu.”
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From the classical tradition
Koans
Eighteen cases from The Gateless Gate, The Blue Cliff Record, the Linji lu, Hakuin, and the Vimalakirti Sūtra. Short, sharp, and impossible to flatten into explanation.
A koan is not a riddle with a hidden answer. It is a case — a preserved exchange, question, or incident — from the classical tradition, used as an object of sustained attention. The word comes from the Chinese gong’an (公案), a public document or legal record: something that cannot be argued away.
In formal Zen training, a student works with a single koan under a teacher’s guidance, sometimes for months or years. What is presented here is not that. These are eighteen cases drawn from five sources: The Gateless Gate, The Blue Cliff Record, the Linji lu, Hakuin’s Orategama, and the Vimalakirti Sūtra. The notes do not explain the koans — they cannot — but they provide context and point toward where attention might usefully rest.
Read slowly. One per sitting is more than enough.
A monk said to Zhaozhou: “I have just entered the monastery. Please teach me.”
Zhaozhou asked: “Have you eaten your rice porridge?”
“Yes,” said the monk.
“Then go wash your bowl,” said Zhaozhou.
Note
The monk wants teaching — instruction, transmission, the special knowledge the master holds. Zhaozhou responds with a chore.
There is no hidden teaching withheld. The instruction is the instruction. What is the relationship between washing a bowl and the nature of mind? Is there a teaching more available to you right now than the thing in front of you?
Huiming had pursued Huineng to take back the robe and bowl that marked transmission. When Huiming caught up, Huineng placed the robe and bowl on a rock and said:
“This robe represents the faith. It is not to be disputed by force. You may take it.”
But Huiming could not lift them. He said: “I have come for the Dharma, not the robe. Please teach me.”
Huineng said: “Without thinking of good or evil, right at this very moment — what is your original face before your parents were born?”
Note
This is not a question about memory or biography. �ore your parents were born” means before your name, before your history, before the accumulation of characteristics you identify as yourself.
The phrase “without thinking of good or evil” is significant: Huineng is asking for attention that is prior to evaluation. Not spiritual goodness. Not improvement. Something else entirely.
What is looking at these words right now?
A monk asked Dongshan: “What is Buddha?”
Dongshan said: “Three pounds of flax.”
Note
Dongshan was weighing flax when the monk asked. He answered without leaving the task at hand. The classical commentators disagree about what exactly this means — which is itself instructive.
One thing is clear: Dongshan does not say “the nature of mind” or 𠇊ll sentient beings” or any of the expected answers. He gives an object, a weight, a specific material thing present at the moment of asking.
Xuedou’s verse commentary: Shooting the golden crow, right to the bone. / Three pounds of flax, Dongshan shows the whole.
Emperor Wu of Liang asked Bodhidharma:
“What is the highest truth of Buddhism?”
Bodhidharma said: “Vast emptiness, nothing holy.”
The Emperor asked: “Who stands before me?”
Bodhidharma said: “I don’t know.”
Note
Emperor Wu had been a generous patron of Buddhism — building temples, supporting monks, copying sutras. He expected confirmation that this accumulated merit had value. Bodhidharma refused to give it.
“Vast emptiness, nothing holy” has been interpreted many ways. It does not mean nihilism. It means something cannot be grasped or measured by piety or accumulation.
The Emperor’s second question — “Who stands before me?” — is answered with the same refusal to be pinned down. What does it mean that the first patriarch of Chinese Zen 𠇍oesn’t know” who he is?
A monk asked Zhaozhou:
“What is the meaning of Bodhidharma coming from the west?”
Zhaozhou said: “The cypress tree in the courtyard.”
Note
“What is the meaning of Bodhidharma coming from the west” is a standard question in the Zen collections — a way of asking: what is the essence of this transmission? What did Bodhidharma bring from India to China?
The monk expected a philosophical answer about origins and transmission. He received a tree.
Wumen’s commentary: If you can clearly understand Zhaozhou’s answer, there is no Shakyamuni Buddha before you, and no Maitreya Buddha after you.
Look at something ordinary near you right now.
Nanquan saw the monks of the east and west halls arguing over a cat. He seized it and said: “Give me a word of Zen, or I will kill it.”
No one answered. Nanquan cut the cat in two.
That evening, Zhaozhou returned from outside. Nanquan told him what had happened. Zhaozhou took off his sandal, placed it on his head, and walked out.
Nanquan said: “If you had been there, the cat would have been saved.”
Note
The monks were debating whether the cat had Buddha-nature — a doctrinal argument, the kind Zen masters found most dangerous. Nanquan’s challenge was not cruelty for its own sake. He demanded a living response, not a learned one. No one gave it.
Zhaozhou’s response — the sandal on the head — cannot be explained without losing it. It satisfied Nanquan. What is it that a sandal on the head communicates that words cannot?
Wumen’s commentary: If Zhaozhou had been there, he would have done the opposite: drawn his sword in reverse.
Linji addressed the assembly: “There is a true person of no rank, always going in and out through the gates of your face. Those of you who have not yet confirmed this — look! Look!”
A monk stepped forward: “What is this true person of no rank?”
Linji stepped down from his seat, grabbed the monk, and said: “Speak! Speak!”
The monk hesitated. Linji released him and said: “The true person of no rank — what a dried piece of shit.”
Note
The “true person of no rank” is one of Linji’s central images — not a being to be found through effort, but what you already are when rank, role, and accumulation are stripped away. He calls it out, he points at it: it’s going in and out through the gates of your face right now.
The monk’s mistake was asking for a definition. Linji’s grab was the teaching — not the words before or after it. The monk was expected to respond from that place, without preparation. The hesitation was the failure.
Linji’s insult at the end is not contempt. It is the same demand, stated differently: don’t dress the thing up. What is it, before you make it presentable?
A monk asked Dongshan: 𠇌old and heat come and go — how do we escape them?”
Dongshan said: “Go where there is neither cold nor heat.”
The monk said: “Where is that place?”
Dongshan said: “When cold, be thoroughly cold. When hot, be thoroughly hot.”
Note
The monk is asking a metaphysical question — about escaping suffering, about transcendence. Dongshan first answers with what the monk wants: a place beyond discomfort. Then he shows where that place actually is.
“Thoroughly” is the key word. Not endurance. Not stoicism. Not a technique for bearing what is unpleasant. Something else: a completeness that leaves no room for the one who is trying to escape.
This koan applies directly to whatever you are experiencing right now — not as consolation, but as a precise instruction. What would “thoroughly” mean, in this moment?
Master Gutei raised one finger whenever he was asked about Zen.
A serving boy began to imitate him.
When Gutei heard of this, he seized the boy and cut off his finger.
As the boy fled crying, Gutei called after him. The boy turned — and Gutei raised one finger.
The boy was suddenly enlightened.
Note
The boy had the gesture but not the ground it came from. He was performing something he had not understood. Gutei’s response was not cruelty — it was the removal of the thing the boy was relying on in place of genuine attention.
Without the finger he had been imitating, the boy had nowhere left to retreat. In that exposure, when Gutei raised one finger again, the boy saw it differently — not as something to copy but as a direct pointing.
What are you imitating that you have not yet understood from the inside?
Every day Master Zuigan called out to himself: “Master!”
He answered: “Yes!”
Then: “Be wide awake!”
“Yes!”
“And from now on, never be deceived by anyone.”
“No, no!”
Note
This was not a performance for students. Zuigan did it every day, alone. The dialogue is entirely internal — and yet the roles of caller and answerer are separated.
Who is calling? Who is answering? Is the one who says “Master!” the same as the one who says “Yes!”? Wumen’s commentary: Zuigan sells and buys. He puts on puppet shows. Why? One calling, one answering; one awake, one undeceived. If you identify with any one of them, you miss them all.
The last exchange — “never be deceived” and the double “no, no!” — is the key. What would it mean to never be deceived? And by whom?
Zhaozhou asked Nanquan: “What is the Way?”
Nanquan said: “Ordinary mind is the Way.”
Zhaozhou said: “So should I try to get toward it?”
Nanquan said: “If you try, you move away from it.”
Zhaozhou said: “If I don’t try, how will I know it is the Way?”
Nanquan said: “The Way does not belong to knowing or not-knowing. Knowing is delusion; not-knowing is blankness. If you truly reach the Way beyond doubt, it is like the vastness of open space — how can it be called right or wrong?”
At these words, Zhaozhou was suddenly enlightened.
Note
Zhaozhou was Nanquan’s student, and this is one of their greatest exchanges. Zhaozhou pushes every logical position: should I try? should I not try? Neither is the answer. Neither is wrong, exactly — they simply miss the point.
“Ordinary mind is the Way” — attributed elsewhere to Mazu — is one of the tradition’s most repeated formulations. It does not mean the mind as it usually operates (distracted, grasping, reactive). It means the mind before it reaches for something other than what it is.
Right now, without trying to get toward anything — what is this?
Yunmen said: “I do not ask you about the fifteenth day. But what about after the fifteenth day? Come, say a word about this.”
He himself answered for everyone: 𠇎very day is a good day.”
Note
The fifteenth day is the full moon — a day of completion, of intensity in the monastic calendar. Yunmen asks: what about after completion? After the special occasion, the retreat, the moment of clarity — then what?
His answer is not consolation. 𠇎very day is a good day” is not the same as 𠇊ll days are equally good” — it is a statement about the quality of undivided attention applied to any day whatsoever. Xuedou’s verse commentary: He wraps it up and gives it to you \u2014 the blue sky, the bright sun.
What would it mean for today — not a special day — to be a good day in this sense?
Deshan came from the north carrying his extensive commentaries on the Diamond Sutra, intending to refute the southern school’s teaching of sudden awakening.
On the road, he bought a rice cake from an old woman and asked her what she was doing. “Making mind-cakes,” she said. “Which mind do you intend to refresh?” Deshan had no answer.
He went to Longtan’s monastery, challenged the master all day, and could not prevail. That night Longtan blew out the candle. In the darkness, Deshan was suddenly enlightened.
The next morning he took his commentaries into the courtyard and burned them, saying: 𠇊ll my exhaustive study of doctrine is like a single hair in the vastness of space.”
Note
Deshan had carried his learning as authority — volumes of commentary on a sutra about the limits of conceptual knowledge. The irony is almost too neat. The old woman’s question about “which mind” stopped him before he even arrived. The candle was the last thing he needed.
After the candle went out, his accumulated doctrine became a liability. What he burned the next morning was not knowledge — it was the belief that knowledge was sufficient for what he was pursuing.
What have you been carrying as authority that might be keeping you from seeing what is already here?
Two hands clap and there is a sound.
What is the sound of one hand?
Note
Hakuin Ekaku (1686–1769) revitalized the Rinzai school after a period of decline and systematized the koan curriculum still used in Japanese Rinzai training today. He introduced this koan as the primary entry koan — replacing the earlier use of Mu — because it generates a different quality of inquiry.
Where Mu cuts off both yes and no, this koan generates a more exploratory searching. Hakuin reports that students would come to him with all manner of answers — none of them right. The point is not to find the correct answer but to exhaust the strategies the mind uses to avoid the question.
Don’t try to think of an answer. Actually try to hear it. What happens?
A monk asked Mazu: “What is Buddha?”
Mazu said: “Mind is Buddha.”
Later, another monk asked the same question.
Mazu said: “Neither mind nor Buddha.”
Note
Both answers came from the same teacher, in response to the same question. Neither answer cancels the other. Mazu gave each monk what that monk needed — which means he was not teaching a fixed doctrine but responding to the condition present in front of him.
Wumen’s commentary: If you directly grasp Mazu’s intention, you put on the Zen robe and eat the Zen food and walk the Zen road and think the Zen thought \u2014 and you still are not Mazu.
“Mind is Buddha” affirms. “Neither mind nor Buddha” refuses the affirmation. What remains when both positions are held at once?
Linji said: “Sometimes a shout is like the precious sword of the Diamond King. Sometimes a shout is like a golden-haired lion crouching on the ground. Sometimes a shout is like a pole with grass dangling at the end, used to fish. Sometimes a shout does not function as a shout at all.
Which of these do you understand?”
A monk began to think about which one. Linji struck him.
Note
Linji is explaining that his shout is not a fixed method — it functions differently depending on what is required. Four categories, four different uses. He then asks the assembly which they understand.
The monk’s mistake was to begin categorizing. He took a teaching about the limits of fixed methods and immediately tried to apply a fixed method (analysis) to it. The strike is not punishment — it is the answer to the question, arriving at the moment the monk stopped being present to it.
The transmission in Zen has never been a concept. What was the strike?
Manjushri asked thirty-one bodhisattvas each to explain the dharma of non-duality. Each gave an answer. Each answer was subtle, precise, and philosophically complete.
Then Manjushri asked: “We have all given our explanations. Vimalakirti — what is the bodhisattva’s entry into the dharma of non-duality?”
Vimalakirti kept silent.
Manjushri exclaimed: 𠇎xcellent! Excellent! Not a word, not a syllable — this truly is to enter the dharma of non-duality.”
Note
This exchange is from a sutra that predates the Chinese Zen school, but it is among the school’s foundational texts. The Vimalakirti Sutra was translated into Chinese by Kumarajiva in 406 CE and was among the texts that shaped Tang-dynasty Zen.
Thirty-one bodhisattvas gave sophisticated answers about non-duality. All were praised. Vimalakirti gave no answer. His silence was praised above all the others. This is not a point about silence being better than words — it is a point about what cannot be carried by language at all.
Wumen later wrote: Vimalakirti’s thunder of silence roared across the three thousand worlds. What was in that silence?
On reading koans without a teacher. In formal Zen training, koans are worked with in a one-to-one encounter with a teacher (dokusan or sanzen). The teacher can tell whether a student’s response comes from direct seeing or from intellectual construction. Without that encounter, the koan remains open — which may itself be the appropriate condition for a reader who has not yet found a teacher.
The value of sitting with a koan — not trying to solve it, not looking for a clever answer, but attending to it honestly — is real regardless of formal context. What the mind does with something it cannot resolve is itself a teaching.
For the complete collections: The Gateless Gate in Yamada Koun’s translation is careful and accessible. Robert Aitken’s commentary is thoughtful. For The Blue Cliff Record, Thomas Cleary’s translation remains the standard English edition.
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Readings
The Platform Sutra
The first text most of these masters point toward. Huineng speaks from inside the tradition — not about it. Any translation will do.
Read it → MastersMeet the masters
Profiles of the figures behind these exchanges: who they were, what they taught, and why the tradition carried their words for a thousand years.
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Choose a koan from this page and sit with it. The practice page has a posture and a method. One koan, ten minutes, nothing else required.
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Note
Buddhist teaching holds that all sentient beings have Buddha-nature — the capacity for awakening. The monk is asking a doctrinal question. Zhaozhou does not answer it.
Mu in Chinese can mean “no” or “not,” but Wumen Huikai’s commentary makes clear that Zhaozhou is not simply saying the dog lacks Buddha-nature. He is cutting off both yes and no. The koan is the word itself: Mu.
Don’t try to solve it. Hold it. Notice what the mind does with something it cannot resolve through thinking.