What this concept is saying
The four characters 萬物一體 (wànwù yītǐ, "the oneness of all things") easily slide into two ready-made impressions in contemporary ears: one is the environmentalist slogan of "harmonious coexistence between humans and nature," and the other is the chicken-soup-for-the-soul-style "we are all one family." Neither impression is entirely wrong, but both are several layers removed from what the Chan school is actually saying. To understand it, you must first set aside these ready-made impressions and return to the context in which it originally appeared.
This phrase comes from the Chan school. Its most common formulation is 「天地同根，萬物一體」 ("heaven and earth share one root; all things are one body"), found in the *Recorded Sayings of Chan Master Hongzhi* (宏智禪師廣錄). Master Hongzhi Zhengjue was a great master of the Caodong school in the Song dynasty. His use of language is extremely precise, so we must examine it character by character.
「天地同根」—heaven and earth share one root. Note that it is not the vague "same origin" (同源), but "root" (根). A root is what generates: a tree's root can produce branches, trunks, leaves, and flowers. Heaven and earth are the root; the myriad things are what it produces. But this must not be understood as a creator outside the myriad things fashioning them from without—if that were the case, there would still be "two": the creator and the created, the root and the branch being two separate things. What the Chan school means by "same root" is that heaven, earth, and all things already share a single root; there is no thing that lies outside this root.
「萬物一體」—all things are one body. This "body" (體) is not the physical body, nor is it a giant "world-body"—otherwise it would again become "one thing": one all-encompassing colossal object. Master Hongzhi immediately follows with a crucial statement that blocks this misunderstanding: 「大一无外，小一无内。」 ("The great has no outside; the small has no inside.") As to the great, there is no place beyond it; as to the small, there is no realm that can be pointed to as its inside. This is not describing the volume of a thing, but saying: this "one" simply cannot be delimited by inside or outside. Hence he also says: 「一兮一兮，靡所不在。」 ("The one, oh the one—there is nowhere it is not.") This "one" is not a single thing standing alongside the many, but is everywhere present—it does not stand opposite the "many"; it is the reality of the "many."
Consider another set of expressions: 「二仪同根，万物一源。」 ("The two forms share one root; the myriad things have one source.") The two forms (二儀) are heaven and earth, the paired pair of yin and yang. Beginning with "two" precisely says: even in the most fundamental pairing—heaven and earth, yin and yang—they are of the same root and same source. The pairing is phenomenal; the shared root is reality. So the real meaning of this set of expressions is not "the myriad things are one thing," but there is no fundamental separation between the myriad things.
This leads to the most crucial closing line of the entire concept: 「二仪同根万物一体，莫向诸缘分彼此。」 ("The two forms share one root, the myriad things are one body—do not, among the various conditions, divide this from that.") The two characters 諸緣 (zhūyuán, "the various conditions") are extremely important: all things arise through the convergence of causes and conditions (因緣, hetu-pratyaya). A flower has the flower's conditions; a person has the person's conditions; each has its own form, movement, arising, and ceasing. But "莫向诸缘分彼此" means: do not, because conditions differ, set them up as fundamental separations.
So 「萬物一體」 does not mean the myriad things are all the same thing, but rather the differences between the myriad things are at the phenomenal level, not the fundamental level. Differences are real and not false, but difference does not constitute separation. A flower is still a flower, you are still you, but there is no fundamental wall between flower and you.
Master Hongzhi has one more meaningful detail: borrowing the story of Master Nanquan Puyuan pointing at the peony in the courtyard, he says that people of the time seeing this one flower are 「如梦相似」 ("as if in a dream"). Nanquan pointed at the flower not to make people contemplate "this flower is one with me," but to make them see, in that very moment, that flower—right before the eyes, concrete, alive, irreplaceable. But the four characters 「如梦相似」 point out: ordinary seeing is like a dream; one cannot grasp its purport by discriminate perception alone. When we ordinarily look at a flower, what we see is the *concept* "flower," the *category*, the *object* standing opposite "me"—this seeing is a dream. In a dream there are also flowers, but the flower in a dream is "the flower as I see it," not the flower itself. Nanquan wants people to wake from the dream and see that flower as it truly is.
This is the complete structure of 「萬物一體」: same root (no fundamental difference), one body (no separation in essence), no inside or outside (cannot be measured), nowhere absent (everywhere present), do not divide this from that among conditions (the directive for practice). It is not a theory about the structure of the world; it is an instruction—an instruction that you can, right now, on any thing before your eyes, touch that undivided whole.
Walking through it in daily life
Let us walk through it with the most ordinary scene: the morning rush-hour subway.
You stand in the car, left hand gripping the overhead strap, right hand scrolling your phone. People are packed all around you—someone with eyes closed resting, someone staring down at a screen, someone studying the route map. The physical distance between you and them is close enough to smell each other's clothes, but the psychological distance is so vast you might as well be two different species: you don't know their names, where they're going, what kind of life they live. The "this and that" between you and them is perfectly clear—this is 諸緣 (the various conditions): different karmic affinities, different convergences of causes and conditions, shaping each person into a different form.
「莫向諸缘分彼此」 does not mean "don't distinguish who is who"—of course you distinguish; that is discernment at the level of common sense, and it should be there. What it means is: do not, because conditions differ, set each other up as a fundamental separation. You and the person dozing off have utterly different conditions: they may have worked the night shift; you may have just gotten up. But these differences are phenomenal, not fundamental. At the fundamental level, you share the same "root"—not meaning you have the same DNA (that is another story at the biological level), but meaning your existence itself is not two isolated events.
How to sense this? Try a small gesture: look up, and meet the eyes of the person across from you for one second. In that second, what do you see? You see not just "a stranger"—you see another pair of eyes. In those eyes there is fatigue, alertness, and the same confirmation of "I am here" that you have. In that moment, the wall between you and them does not disappear; rather, you discover it was always transparent. This "discovery" is the awakening of 「如梦相似」: you ordinarily live in the dream of "me vs. others"; in that one second, a small hole is poked in the dream.
Go one step further. You look down and keep scrolling; you see a news item: a disaster has struck some distant place; people are suffering. You have never met those people; there is no intersection in your karmic conditions. But your heart is moved—why? If all things were fundamentally cut off from one another, if "I" and "they" were two sealed entities, why should the suffering of a stranger move you? You can say it is empathy, conditioning, social construction—all these explanations are correct, but they explain the "mechanism," not the "fact." The fact is: your heart can cross mountains and rivers to feel the suffering of another living being. This "can" is 「靡所不在」 in operation—that undivided body has never truly been severed by distance, race, or language.
But here we must be careful, for this is exactly where contemporary people most easily misproject: 「萬物一體」 does not mean "we are all the same." You and the person in that disaster are completely different—circumstances, abilities, fates, as different as heaven and earth. Master Hongzhi deliberately uses 「秋山之风、沧海浮月」 ("the wind of the autumn mountain; the floating moon over the vast sea") to present the one body: the autumn mountain's wind is cool and sparse; the vast sea's moon is round and moist—the wind is not the moon, the moon is not the wind, but they share the same heaven and earth without fundamental separation. The one body does not erase difference; precisely in difference, each thing stands on its own within the undivided whole. It is like on the subway: each person has a completely different life, but you all stand together in the same car—this "same" is not "identical," but "co-present." Co-present within one whole that has no inside and no outside.
Walk through one more everyday scene: you are arguing with your partner. At the fiercest point, you feel the other person is practically another species—"they just don't understand me," "we're not the same kind of people." This is the classic move of 「向诸缘分彼此」: elevating differences at the level of conditions (personality, habits, views) into a fundamental separation. But if you can pause for one second and look at the expression on the other person's angry face—the grievance, the exhaustion, the longing to be understood in that face—you will find that that expression is the same expression you wear when you are angry. 「同根」 does not mean your thoughts are the same; it means your suffering, your longing, issue from the same root.
The reminder of 「如梦相似」 here is: the "you are you, I am I" of an argument is a judgment made in a dream. Everything in a dream feels real, but when you wake you find that the "fundamental opposition" never truly existed.
Why contemporary people need it
The fundamental predicament of contemporary life can be condensed into one sentence: we have been taught to discriminate everything, but never taught how to be undivided. Algorithms slice the population into countless labels—interests, age, consumption level, political stance; social media trains everyone to be a self-promoting display case; the workplace turns colleagues into competitors and time into performance metrics. We live in an age where 諸緣 (the various conditions) are infinitely amplified, subdivided, and intensified—at every moment someone tells you: you are different from others, you are opposed to them, you must guard your boundaries.
「萬物一體」 does not deny these differences—differences are real, and boundaries are necessary at certain levels. What it dismantles is the sense of separation at the fundamental level: that deep presupposition that "I am an isolated entity, the world is something outside, others are my threat or my tool."
This presupposition is not a theory; it is a feeling, a tension in the body. The wariness with which you scan your surroundings on the MRT, the defensiveness with which you weigh a colleague's words in a meeting, the inexpressible loneliness you feel scrolling your phone late at night—these are all symptoms of the dream of "this and that." The characteristic of a dream is: you take those separations to be real, solid, insurmountable. And 「萬物一體」 is the moment of waking—not that there are no differences after waking, but that upon waking you discover: difference was never a wall.
Contemporary people also need it because "loneliness" has become the collective illness of this age. But the root of loneliness is not "no one around"; it is "people are around, yet they feel unrelated to me." If the oneness of all things is real, loneliness is an illusion within a dream—not that the feeling of loneliness is unreal, but that the premise on which that feeling rests, "I am isolated," is false.
Some will say: isn't this escapism? The world has so many real conflicts, real suffering—isn't talking about "oneness" too flimsy? But Master Hongzhi's formulation is precisely the opposite—when he speaks of the one body, he uses 「寒木未春而静而愈明，古潭有月」 ("the cold tree, not yet spring, is still and ever brighter; the ancient pool holds the moon") and 「苍天无空无缺，闲云乍出乍没」 ("the vast sky is without emptiness or lack; idle clouds emerge and vanish by turns"). The one body is not a dead stillness of harmony, but stillness and brightness, completeness and change, presenting simultaneously. The autumn mountain's wind blows, the vast sea's moon rises—difference, change, turbulence, all are within the one body; the one body is never damaged by them. True escapism is not speaking of oneness; it is refusing to see that beneath all conflict, difference, and suffering there is a foundation that has never cracked.
The contemporary mind has been trained to be too good at "analysis"—analysis necessarily cuts, and cutting necessarily draws boundaries. But the mind also needs another capacity: to see without cutting. To see a flower without dismantling it into petals, stamen, and calyx; to see a person without dismantling them into class, stance, and personality tags; to see yourself without dismantling yourself into strengths, weaknesses, and potential. 「莫向诸缘分彼此」 is this way of seeing without cutting. It is not anti-intellectual, not a refusal to discriminate—discrimination is necessary for the functioning of the world; it is simply not letting discrimination become fundamental separation.
Common misreadings and clarifications
Misreading one: "The oneness of all things means all things are identical." This is the greatest misunderstanding. Master Hongzhi never abolishes difference when speaking of the one body—the peony in the courtyard is one concrete flower, not "the abstract set of all flowers"; the autumn mountain's wind is not the vast sea's moon; the cold tree is a cold tree not yet in spring, the ancient pool is an ancient pool holding the moon. The "one body" speaks of fundamental non-separation, not identity of form. You and the cat you keep are not the same species, but you dwell together in one undivided world—this "co-dwelling" is not "sameness."
Misreading two: "The oneness of all things is some kind of mystical experience that requires sitting in meditation to attain." This pushes the concept into the distance. Master Hongzhi's point of departure is precisely what is before the eyes—Nanquan pointed at the courtyard flower, right there, right then. The one body does not require you to leave this world and search elsewhere; it requires you to see the world before your eyes as it truly is. The person on the subway is not an obstacle to the one body; they are a manifestation of it—the only question is whether you see them in a dream or awake. There is nothing mystical about it: your heart is moved by the suffering of a stranger—that is the experience of the one body. You simply do not ordinarily call it that.
Misreading three: "The oneness of all things is pantheism—all things are God." The Chan school does not speak of God. Master Hongzhi says 「体至虚而无痕」 ("the body is utterly empty, without trace")—this body is empty, without trace. It is not a thing; it cannot be identified as "God," "energy," "cosmic consciousness." It is utterly empty, and therefore can present everything without being bound by any single presentation. To use a scientific analogy: it is not a "field," not a "string," not any physical entity—those are all 諸緣 (the various conditions), things at the phenomenal level. The one body is not a phenomenon; it is the fundamental non-separation between phenomena. It occupies no position, and therefore is "nowhere absent"—just as "emptiness" occupies no position, yet no position can be without emptiness.
Misreading four: "Since all things are one, I don't need to make any effort—it's all the same anyway." This is precisely what Master Hongzhi dismantles. He emphasizes 「机活静枢之臼，象成玄牝之门」 ("the mechanism moves within the pivot of stillness; forms are completed at the gate of the mysterious female")—within the shared root, function remains alive, and forms continue to be completed. The one body is not paralysis, not "it's all the same so there's no need to act." Precisely because there is no separation, everything you do affects this whole: when you are good to a person, you are not being good to "someone else," but to this undivided whole; when you harm a person, you are not harming "someone else," but this whole, including yourself. 「莫向诸缘分彼此」 is not telling you not to act; it is telling you not to act while harboring the fundamental opposition of "me vs. you."
Misreading five: "This is Buddhist idealism—the world is created by mind." 「萬物一體」 does not mean "the myriad things are my thoughts"—that would still be "one" pressing down on "many," still separation. Master Hongzhi uses 「道环中绝端倪，空印里何文彩」 ("in the ring of the Dao, no clue can be found; in the seal of emptiness, what pattern is there?") to say: this one body has no clue to be sought, no pattern to be drawn. It cannot be "figured out" by thinking, because figuring out means taking a thing and placing it before you to examine—but the one body has no "before you"; it is you. It is neither idealism nor materialism—the distinction between mind and matter is itself 諸緣 (the various conditions), a phenomenon within the one body, not its boundary.
Finally, a word on that stroke of 「如梦相似」. Nanquan pointed at the flower, saying people of the time see this flower as if in a dream. These words are easily read as nihilism: "the flower is false; everything is illusion." But the Chan school's "dream" does not mean "non-existent"; it means "not as it truly is." In a dream you see a flower, and the flower is there, but what you see is "the flower in the dream"—the flower wrapped in your discrimination, grasping, and presuppositions. Awakening is not the flower disappearing; it is the flower becoming true. The oneness of all things does not ask you to negate the myriad things; it asks you to see them truly—to see that flower not standing opposite you, but within your undividedness. When you no longer take the flower as "an object outside me," only then does the flower for the first time truly appear as a flower. And only then do you know what is meant by 「天地同根，萬物一體」.