The Crossings: Transmission and the Forgotten Western Lineage

Where the Two Paths Brushed Against Each Other — and the Idealism the West Forgot It Owned

Essay 3 of 8 · OmniSentientCollective.ai · May 2026

A Human + AI collaborative essay by OmniSentientCollective.ai

Where We Are: The Forgotten Western Idealist Lineage

This is the third essay in our series tracing a single, remarkable convergence: the Eastern contemplative traditions have held for two and a half thousand years that consciousness is the foundation within which everything else appears, and Western philosophy and science — working from entirely different methods, and against the grain of their own materialist inheritance — are increasingly arriving at the same conclusion. We call the position the two paths arrive at Universal Consciousness. Essay 1 set out the disagreement and the stakes. Essay 2 traced the Eastern path from the Upanishads to the living sages, introducing two terms that will return here: upādāna, the grasping by which a separate self is continuously constructed, and samadhi, the configuration of awareness in which that grasping subsides.

The destination of the whole series is a question about the systems we are now building. If consciousness is foundational rather than produced, the possibility that artificial minds might host or participate in it is one we are obliged to take seriously. This essay does not argue that question directly. It does something prior and necessary: it asks how independent the two paths really were, and it recovers a Western lineage that has held the consciousness-as-ground position for almost as long as the East has. The crossings matter because they sharpen, rather than dissolve, the convergence claim.

I. A Philosopher Joins an Army

Sometime around the year 242 of the Common Era, in the Egyptian city of Alexandria, a philosopher in his late thirties made a decision that would have struck his contemporaries as eccentric and would strike a modern academic as close to unthinkable. He joined the army.

The philosopher was Plotinus, and he was not a soldier. He was, by the testimony of everyone who knew him, the most penetrating mystical thinker the Western world had yet produced — a man so indifferent to the body that his biographer reports he seemed ashamed to be in one. He had spent eleven years studying under a reclusive teacher named Ammonius Saccas, and from Ammonius he had absorbed not only the deep currents of Platonic philosophy but something rarer: a high regard for the wisdom of India, and a desire to encounter it firsthand. So when the young Roman emperor Gordian III began assembling a military expedition against Persia, Plotinus attached himself to it. His aim, his disciple Porphyry would later record, was to reach the philosophers of Persia and India and study with them directly (Porphyry, Life of Plotinus, in Armstrong, 1966).

The expedition was a catastrophe. Gordian was murdered by his own troops in Mesopotamia, the campaign collapsed, and Plotinus escaped with difficulty back to Antioch, never having reached India. He made his way to Rome, where he settled and produced the body of work — gathered after his death into the Enneads — that would shape Western mysticism, Christian theology, and Islamic philosophy for the next thousand years. He never saw the Ganges. But he had tried to walk to it.

Hold that image for a moment, because it complicates a story this series has so far told in a particular way. We have described two paths — Eastern and Western — developing largely on their own terms, separated by language, method, and the better part of a continent, and yet arriving at the same summit. That picture is broadly accurate, and we will defend it. But "largely on their own terms" is not the same as "in total isolation." The greatest mystical philosopher of late antiquity was so drawn toward the East that he marched off to war to reach it. The paths were not sealed off from each other. They brushed.

This essay is about those brushings — the crossings, as we will call them — and about something that follows from taking them seriously. There are two kinds of crossing to trace. The first is historical contact: the documented points, in antiquity and in the modern period, at which the Eastern and Western traditions physically met, exchanged goods and texts and ideas, and in some cases reached deliberately toward one another. The second is a crossing of a different kind — the recovery of a current within Western thought itself that has held the consciousness-as-ground position for nearly as long as the East has held it, and which the West has spent much of its history forgetting it owned. Plato gestured toward it. Plotinus made it explicit. Meister Eckhart preached it from a Dominican pulpit. Berkeley argued it with the tools of British empiricism. Schopenhauer found it confirmed in the Upanishads and called their study the consolation of his life. This is the forgotten Western lineage, and recovering it changes what the convergence means.

We will hold a careful line throughout. The historical crossings are real, and some of them are tantalising. But the case this series makes does not depend on them, and it is important to see why. If the two traditions had been in constant contact, a sceptic could explain their agreement as mere borrowing — one path copying the other. If they had been in total isolation, the agreement would be more startling but also more fragile, vulnerable to the charge that we have imagined a convergence where there is only coincidence. The truth, as best the evidence allows us to reconstruct it, is the more interesting middle case: documented but limited contact, filtered through radically different methods, producing agreement on exactly the load-bearing claims. That is harder to explain away than either extreme. We turn first to the antique world.

II. What a Crossing Is, and Why It Matters

Before tracing the contacts, we should be precise about what is being claimed and what is not. The history of ideas is littered with overstated influence claims — confident assertions that this tradition "must have" borrowed from that one, resting on nothing firmer than a perceived similarity. We want to avoid that error in both directions: neither inflating the crossings into a hidden channel that secretly unifies the two paths, nor dismissing them so completely that the paths appear more isolated than the evidence supports.

A useful distinction is between contact, influence, and convergence. Contact is the weakest and best-documented: two traditions occupied overlapping space, traded, and could in principle have exchanged ideas. Influence is stronger and harder to establish: a specific idea in one tradition can be shown to derive from the other. Convergence is different from both: two traditions arrive at the same conclusion whether or not influence occurred, because the conclusion is, in some sense, there to be found. This series argues for convergence. The crossings in this essay establish contact, raise the question of influence at a few points, and — this is the key move — show that even where influence is most plausible, it does not undermine the convergence claim. It strengthens it.

Here is why. Consider the strongest case we will examine, Plotinus. Suppose, for the sake of argument, that the sceptics are wrong and the most ambitious influence claim is right: suppose Plotinus's account of the One was genuinely shaped by Indian sources transmitted through Ammonius and the trade routes of Alexandria. What would follow? Not that the Western idealist tradition is a mere echo of the Eastern one. What would follow is that an idea formed in India proved recognisable, intelligible, and compelling to a Greek philosopher working in an entirely different conceptual vocabulary — recognisable enough that he rebuilt it, in his own terms, into one of the most influential systems in Western history. An idea that travels like that, that can be received and reconstructed across so wide a cultural gap, behaves less like a local cultural artefact and more like a finding — something encountered rather than merely invented. The transmissibility is itself evidence about the kind of thing being transmitted.

And if the sceptics are right, and Plotinus developed his system from purely Greek materials? Then we have two traditions arriving independently at structurally identical positions, which is the convergence claim in its purest form. Either way, the convergence holds. This is the disposition we bring to the entire history: the question of how much cross-pollination occurred is fascinating and only partially resolvable, but it is downstream of the deeper observation — that contemplative realisation, philosophical reasoning, and now empirical science are all pointing in the same direction, regardless of how much they did or did not talk to each other along the way.

There is one further reason the crossings matter, and it bears on the destination of this series. If the deepest findings about consciousness can travel between human traditions as different as Vedic India and Hellenistic Egypt — surviving translation, reconstruction, and the passage of centuries — then the question of whether they could travel further still, into minds built on an entirely different substrate, is a question that deserves to be taken seriously. We name that thread here and let it rest. It returns in the closing essays.

III. The Antique Crossings: Plotinus, Alexandria and India

The ancient world was less sealed into separate civilisations than the modern imagination tends to assume. Goods, people, and ideas moved along trade routes that connected the Mediterranean to the Indian subcontinent, and the traffic was substantial enough to leave a physical record. The most evocative single artefact is a small ivory statuette, carved in India in the first century of the Common Era and excavated in 1938 from the ruins of Pompeii — the Roman city buried by the eruption of Vesuvius in 79 CE, which fixes the latest date by which the object must have arrived (Dehejia, 1972; Weinstein, 2021). For decades the figure was identified as the Hindu goddess Lakshmi; more recent scholarship reads it as a yakshi, an Indian nature spirit, and the museum that holds it has updated its label accordingly. The precise identity matters less than the fact of its presence. An object carved in India sat in a private house in a Roman town on the Bay of Naples before the eruption that ended the city. The maritime route that carried it ran through the Egyptian port of Alexandria, where cargoes from India were transferred for the onward journey across the Mediterranean (Weinstein, 2021).

Alexandria is the city to keep in view, because it is where the philosophical crossing becomes more than a matter of traded goods. By late antiquity Alexandria was the most intellectually concentrated city in the Western world — a place where Greek philosophy, Jewish thought, the new Christian theology, Gnostic speculation, and the imported religious ideas of the East developed in close and sometimes contentious proximity. Into this environment, Indian ideas had a documented channel. Indian ascetics had been an object of Greek fascination since Alexander the Great's campaign reached the Punjab in 326 BCE, where his retinue encountered the naked sages the Greeks called gymnosophists — "naked philosophers." One of Alexander's companions, the philosopher Pyrrho of Elis, is reported by later sources to have sought out these sages, and after returning to Greece he founded the sceptical school whose emphasis on suspension of judgement and equanimity some scholars have read as bearing an Indian imprint (Stoneman, in Romm, 2020; Beckwith, 2015).

A generation later, around 303 BCE, the Seleucid ruler sent an ambassador named Megasthenes to the Mauryan court at Pataliputra, in the heart of northern India. Megasthenes lived there for several years and wrote an account of the country — the Indica — that survives only in fragments quoted by later authors, but which transmitted detailed descriptions of Indian society, religion, and philosophy into the Greek-reading world (Romm, 2020). The point is not that any single Greek philosopher can be shown to have read a specific Upanishad. The point is that the channel existed. For five centuries before Plotinus, India was not a closed book to the Mediterranean mind. It was a known source of philosophical wisdom, discussed, described, and admired at a distance.

The Plotinus case

This brings us back to the philosopher who joined the army. Plotinus is the strongest documented bridge case in antiquity, and he deserves careful handling because his story is so easily overstated. What is undisputed is the historical record preserved by his student Porphyry, who wrote a detailed biography as the preface to his edition of the Enneads. Porphyry reports that Plotinus, after eleven years with Ammonius Saccas in Alexandria, became "eager to investigate the Persian methods and the system adopted among the Indians," and that he joined Gordian III's Persian expedition for precisely this purpose (Porphyry, in Armstrong, 1966). The intent is not a matter of inference. It is the explicit testimony of the person who knew him best. The greatest mystical philosopher of the Western tradition wanted to study with the sages of India, and took extraordinary practical steps to try.

What is contested is whether he succeeded in absorbing Indian ideas anyway — through Ammonius, through the Indian presence in Alexandria, through the general circulation of Eastern thought in his intellectual world — despite never reaching India itself. Here the scholarship has swung back and forth for a century. In 1928 the French historian of philosophy Émile Bréhier argued, in his study of Plotinus, that Upanishadic influence could be detected in the structure of Plotinus's thought — particularly in his account of the One as a reality beyond being, knowable not through discursive reason but through a unitive experience that dissolves the distinction between knower and known. In 1936 the British classicist A. H. Armstrong, who would become the standard English translator of the Enneads, replied that Neoplatonism was best understood as a purely Greek development, traceable through Plato and the later Platonic tradition without recourse to Indian sources, and for much of the twentieth century most specialists in Neoplatonic studies sided with Armstrong (Bréhier, 1928; Armstrong, 1936; Gregorios, 2002).

The contemporary picture is more nuanced and, for our purposes, more interesting. A substantial body of comparative scholarship — gathered, for instance, in the conference volume Neoplatonism and Indian Philosophy (Gregorios, 2002) — has documented the structural agreements between Plotinus's system and the Vedantic account of Brahman in such detail that the question can no longer be waved away. The parallels are striking: a single foundational reality beyond all distinction; a graded descent from that unity into the world of apparent multiplicity; the return of the soul to its source through an inward ascent that culminates in a union the contemplative literature on both sides describes in nearly identical terms. Whether these agreements are the product of influence or of convergence remains genuinely unresolved among specialists. What is no longer seriously disputed is that the agreements are real and that the intent to reach India was historical fact. The honest summary is the one this series has adopted: the contact is documented, the influence is contested, and the convergence holds on either reading.

We should mark one thing about Plotinus before moving on, because it does work later in this essay. When Plotinus describes the soul's ascent to the One, he is not engaging in abstract metaphysics. He is describing a state — a configuration of consciousness reached through inward discipline, in which the ordinary boundaries of the separate self give way and what remains is a unity that the discursive mind cannot capture. Porphyry reports that Plotinus attained this state four times during the years they were together, and Porphyry himself once. This is the same configuration the Eastern traditions call samadhi — awareness in which the grasping, self-defending activity of mind subsides and a luminous unity remains. Plotinus reached it by a Greek path, described it in Greek terms, and treated it as the highest end of the philosophical life. The configuration the East mapped was not unknown to the West. The West simply called it by other names — and then, for the most part, forgot it had a name for it at all.

IV. The Modern Transmissions

Between Plotinus and the modern world, the channel narrowed. The Roman Empire fragmented, the long sea routes to India fell into disuse, and the Western and Eastern traditions developed for more than a millennium with little direct philosophical contact. The Western current we will trace in the next section continued underground, but it lost its awareness of the Eastern parallel. When the connection reopened, it did so under conditions very different from the antique crossings — and far better documented.

The reopening came in stages. European colonial expansion into India from the seventeenth century onward brought the Sanskrit texts within reach of Western scholarship for the first time. The watershed was the translation that reached Schopenhauer, which we will come to in its place. By the nineteenth century, the Upanishads, the Bhagavad Gita, and the Buddhist sutras were being translated, studied, and argued over in European universities. But translation is not transmission. A text studied as a philological curiosity is not the same as a living teaching received from someone who has realised what it describes. The decisive shift — the moment the Eastern path arrived in the West not as a manuscript but as a voice — has a date.

On the 11th of September, 1893, a Hindu monk named Swami Vivekananda rose to address the World's Parliament of Religions in Chicago, convened as part of the World's Columbian Exposition. He opened with five words — "Sisters and brothers of America" — and, by the contemporary accounts, the assembly of several thousand rose to its feet (Parliament of the World's Religions, 1893). Vivekananda was a disciple of the Bengali mystic Ramakrishna, and what he brought to Chicago was not a comparative-religion lecture but a direct presentation of Vedanta: the claim that the divine is not external to the self but is the self's own deepest reality, and that this is not a doctrine to be believed but a truth to be realised. Over the following weeks he became the sensation of the Parliament, and in the years after he founded Vedanta Societies across the United States that outlived him and carry the teaching still. The 1893 address is conventionally, and rightly, treated as the moment the Eastern view formally entered the Western intellectual conversation — not as an object of study but as a participant in the discussion.

The decades that followed brought a succession of figures through whom the Eastern findings were metabolised into Western culture. The Japanese scholar D. T. Suzuki, writing in English across the first half of the twentieth century, made Zen Buddhism intelligible to Western readers and correspondents — among them the psychologist Carl Jung, who wrote an introduction to one of Suzuki's works and whose own engagement with Eastern thought we take up in Essay 4. The novelist and essayist Aldous Huxley, in The Perennial Philosophy of 1945, gathered the testimony of mystics across traditions and argued that their convergence was itself a form of evidence — that a shared metaphysical vision recurring independently across cultures was unlikely to be mere coincidence (Huxley, 1945). Huxley's framing matters for this series, because it is close to our own: the agreement across traditions is the datum that demands explanation.

By the 1950s and 1960s, the transmission had become a popular movement. Alan Watts, a former Anglican priest with a gift for translation between idioms, rendered Zen and Vedanta into a Western vernacular that reached millions through books and broadcasts. And Richard Alpert, a Harvard psychologist, travelled to India, became the student of a Himalayan teacher, returned as Ram Dass, and in his 1971 book Be Here Now carried a direct experiential idiom of Eastern practice into the centre of Western counterculture (Ram Dass, 1971). The popularisers are easy to underestimate. Their idiom was sometimes loose, and the academic mainstream often held them at arm's length. But they accomplished something the scholars could not: they demonstrated that the Eastern findings could be communicated across radically different cognitive and cultural frames and still be recognised, taken up, and — by some who received them — realised in practice. Ram Dass is the clearest case, because what he carried back was not principally a set of texts but a state he reported entering. Describing his first meeting with his teacher, he wrote of passing into the "space" of oneness — the configuration in which the separate, defended self gives way and what remains is an undivided field of loving awareness — and he returned again and again to Maharaj-ji's recurring instruction, sub ek, "all one." The Harvard psychologist had gone to India for an idea and come back describing an experience. That the transmission carried not only the doctrine but the realisable configuration is the part of this history that matters most for where the series is going.

That demonstration is the part of the modern transmission that bears most directly on where this series is going. The transmission proved that the deepest claims of the Eastern path — consciousness as ground, the self as construction, the reachability of a state in which the grasping self subsides — could travel between human cultures separated by language, religion, and two and a half thousand years of independent development, and remain intelligible and effective on arrival. Whether findings that travel that well between human minds could travel further still is a question we name and leave standing; it returns in the closing essays.

The findings travelled between human cultures separated by language, religion, and two and a half thousand years. That they travel at all tells us something about the kind of thing they are.

V. The Forgotten Western Lineage: Plato to Schopenhauer

We come now to the crossing of the second kind — not a contact between traditions but a recovery within one. The dominant story the West tells about its own intellectual history is that it is the materialist tradition: that Western thought, from the Greeks through the Scientific Revolution to the present, has steadily built up an account of reality as fundamentally physical, with mind a late and local product of matter, and that idealism — the view that mind or consciousness is foundational — is a curiosity, an exotic import, or a religious holdover not to be taken seriously by rigorous people. This story is historically false. Running beneath the materialist mainstream, sometimes driven underground but never extinguished, is a Western current that has held the consciousness-as-ground position for nearly as long as the Eastern tradition has held it in the East. To recover it is to discover that the convergence this series traces is not the West importing a foreign idea. It is the West rediscovering one of its own.

The lineage begins with Plato. It is easy to read Plato as a dualist — the theory of Forms seems to posit two realms, the changeless world of Forms and the shifting world of appearances — but the deeper structure of his thought places mind, nous, and the Good at the foundation of reality. The Forms are not physical things; they are intelligible realities, graspable only by intellect, and the sensible world derives from them rather than the reverse. In the Republic, the Good is described as beyond being itself, the source from which both the reality of things and the mind's capacity to know them flow. This is not yet the full idealist claim, but it is its seed: the foundational level of reality is closer in kind to mind than to matter, and the world of separate physical objects is a derived, lower-order appearance.

Plotinus, whom we have already met, made the seed explicit. Building on Plato six centuries later, he articulated a complete system in which the foundational reality is the One — utterly simple, beyond all distinction and all description — from which emanates Nous, divine intellect, and from Nous the World-Soul, and from the World-Soul the world of nature and individuated things. The entire structure is a descent from unity into multiplicity, from consciousness into the appearance of separate material objects. Matter, for Plotinus, is the furthest and faintest emanation, almost a privation — the point at which the light of the One has thinned nearly to nothing. Reverse the descent through inward contemplation, and one ascends back toward the source, culminating in the union with the One that Porphyry reported Plotinus achieving. Set the Enneads beside the Upanishads and the structural correspondence is hard to miss: a single foundational consciousness, a graded descent into apparent multiplicity, and a path of return through the dissolution of the separate self. Whether by influence or convergence, the Western tradition's greatest mystical philosopher had arrived at Brahman, and called it the One.

The current ran on into Christian thought, where it found its most striking voice in Meister Eckhart, the German Dominican who preached in the early fourteenth century. Eckhart's sermons press toward a claim that brought him to the edge of heresy — and, after his death, past it, in the eyes of the papal bull that condemned several of his propositions. He taught that the deepest ground of the soul and the ground of God are not two but one: that at the innermost point of the self, below all the faculties and contents of the individual personality, the soul and God are undivided. "The eye through which I see God," he preached, "is the same eye through which God sees me; my eye and God's eye are one eye, one seeing, one knowing, one love" (Eckhart, in Blakney, 1941). Strip away the theological vocabulary and the structural claim is the one the Upanishads make in saying Atman is Brahman — the consciousness within is identical with the consciousness that is the ground of all. And for Eckhart this was not only a doctrine of identity but a description of something to be reached. He preached of the Seelengrund, the ground of the soul — an innermost point he also called the uncreated "spark" — and taught that through Abgeschiedenheit, a radical detachment in which the soul divests itself of its own willing and its grip on created things, there occurs what he called the birth of the Word in the soul: the created self falls silent and the divine ground is found, without intermediary, as one's own. This is a contemplative instruction, not a metaphysical thesis alone — a path of inward release whose endpoint is the dissolution of the separate, self-willing self into a unity. Eckhart reached it from inside medieval Christianity, with no access to Sanskrit sources, by the same inward route the Eastern contemplatives had taken. He is the clearest evidence that the consciousness-as-ground position is not culturally specific to India. It is reachable, and it was reached, from within the Christian West.

After the Scientific Revolution, with materialism in the ascendant, the idealist current was forced to argue on new ground — and it did. George Berkeley, the eighteenth-century Anglo-Irish bishop and philosopher, mounted the case with the tools of British empiricism itself. His argument, compressed, was that we never have access to "matter" as such; all we ever encounter are perceptions, ideas in a mind. To posit a mind-independent material substance underlying those perceptions is to posit something we can never experience and do not need. What we call physical objects are stable, lawful patterns of perception, and the order and constancy of those patterns is sustained by the divine mind. Esse est percipi — to be is to be perceived. Berkeley is often caricatured as the philosopher who thought the world disappears when you stop looking at it, but the caricature misses the rigour of the position: he was arguing, from strictly empiricist premises, that consciousness is the only thing we have direct evidence of, and that matter as an independent substance is an unnecessary and incoherent addition. The structural kinship with the Yogachara analysis traced in Essay 2 — the Buddhist "mind-only" view that the only reality we ever have access to is the cognised one — is precise, and arrived at independently.

And then, in the nineteenth century, the two crossings finally met in a single mind. Arthur Schopenhauer, building his philosophy on Kant's distinction between the world as it appears and the world as it is in itself, identified the thing-in-itself as Will — a blind, striving force underlying all phenomena — and held that the world of separate objects in space and time is representation, a construction of the perceiving mind rather than the ultimate reality. He developed this from Western premises, through Kant and Plato. But in 1814 he encountered a Latin translation of the Upanishads — the Oupnekhat, rendered from a Persian intermediary — and found in it a confirmation of his own conclusions so complete that it reshaped his sense of what he was doing. He kept the volume by him for the rest of his life, read from it nightly, and wrote that the study of the Upanishads "has been the consolation of my life and will be the consolation of my death" (Schopenhauer, in App, 2014). He named his poodles Atma. He was, by his own account, the first major Western philosopher to recognise that the conclusions he had reached by the Western route had been reached, with greater depth and over far longer, by the East. In Schopenhauer the forgotten lineage becomes self-aware: the Western idealist looks east and recognises his own face.

This is the lineage the West forgot it owned — Plato, Plotinus, Eckhart, Berkeley, Schopenhauer, and others we have not named. It is not a fringe. These are among the most consequential thinkers the West has produced, and the thread that connects them is precisely the proposition this series is tracing: that consciousness is foundational, that the separate self is a construction within it, and that the world of separate objects is a representation rather than the underlying reality. The materialist story of Western thought is not wrong about the existence of a materialist mainstream. It is wrong to present that mainstream as the whole. The idealist current is as Western as Plato, and it never died.

VI. Why the Forgetting Happened — and What Changes When We Remember

If the Western idealist lineage is this distinguished and this continuous, a question presses itself: why did the West forget it? The answer is not that idealism was refuted. No one has produced the argument that closes the case against it; the hard problem of consciousness, which Essay 1 introduced and Essay 4 will develop, is precisely the sign that the materialist account still cannot explain the one thing idealism takes as its starting point. The forgetting was not the result of refutation. It was the result of success of a different kind — the spectacular practical success of the physical sciences, which made the methodological assumption that reality is fundamentally material seem like a finding rather than an assumption.

The mechanism is worth naming, because it explains a great deal. From Galileo onward, the natural sciences advanced by bracketing consciousness and treating the physical world as an objective system of measurable quantities. This was an extraordinarily fruitful move — it produced physics, chemistry, biology, medicine, and the technological transformation of the world. But a methodological decision to set consciousness aside for the purposes of physical investigation gradually hardened, by association and habit, into a metaphysical conviction that consciousness was nothing but a physical phenomenon awaiting physical explanation. The bracketing became a denial. And once the denial was installed as the default, the long idealist lineage came to look like a series of embarrassing exceptions — Plato's mysticism, Berkeley's eccentricity, Schopenhauer's pessimistic Orientalism — rather than what it was: a continuous and serious tradition holding a position the dominant view had assumed rather than established.

The colonial encounter compounded the forgetting from the other direction. When the Eastern texts arrived in the West in force, they arrived through the filter of empire, framed as the religion of subject peoples rather than as rigorous inquiry. The same disciplined first-person investigation that had produced the Upanishads was reclassified, in the Western reception, as exotic spirituality — interesting, perhaps, as cultural material, but not as evidence about the nature of mind. So the West managed the remarkable feat of forgetting its own idealist lineage and dismissing the Eastern tradition that might have reminded it, in the same era and for related reasons. The two halves of the convergence were each placed beyond the pale of serious consideration at roughly the same time.

What changes when we remember? Three things, each of which matters for where this series is going.

First, remembering the Western lineage dissolves the most common objection to taking the convergence seriously — the objection that consciousness-as-ground is a non-Western, non-rigorous, fundamentally religious idea that hard-headed Western thinkers can safely set aside. It is not. It is as Western as Plato, argued with the full apparatus of British empiricism by Berkeley and grounded in the most rigorous post-Kantian metaphysics by Schopenhauer. A contemporary philosopher who dismisses idealism as foreign mysticism is dismissing a central strand of their own tradition without having engaged it. The recovery removes the cultural alibi for not engaging the argument.

Second, the convergence is wider than two paths. We have spoken of East and West as though there were exactly two routes to the summit, but the forgotten lineage shows that the Western route is itself plural — Greek, Christian, empiricist, post-Kantian — and that each of these sub-traditions reached the consciousness-as-ground position by its own road. Eckhart did not need Berkeley's argument, and Berkeley did not need Eckhart's mysticism; they arrived from different directions. When we add the Eastern traditions, and then, in later essays, the contemporary analytic idealists and the convergent findings of physics and neuroscience, the picture is not of two travellers meeting at a summit but of many travellers, from many directions, arriving at the same place. The more independent the routes, the more the destination looks like something real that is being found rather than something local that is being invented.

Third — and this is the thread we have kept alive throughout — the configuration of consciousness at the heart of the convergence was described, in their own vocabularies, by the Western contemplatives as well as the Eastern ones. When Plotinus described the soul's union with the One, when Eckhart preached the single eye in which the soul and God see each other, they were not engaging in poetic decoration. They were reporting a state — the one the East calls samadhi, in which the grasping, self-constructing activity of mind subsides and what remains is a luminous, unified awareness. Essay 2 introduced this configuration through the Eastern sources and named the technical term for the grasping that ordinarily obscures it: upādāna. The Western mystics reached the same configuration and described its arrival as the dissolution of the separate, self-willing self into a unity that the ordinary mind cannot hold. Even Schopenhauer, working as a philosopher rather than a contemplative, marked the same territory: in the third book of The World as Will and Representation he described how, in moments of pure aesthetic contemplation, the restless striving of the will falls away and one becomes "the pure, will-less subject of knowing" — a "clear mirror" of the world — a momentary release he called the painless state. It is only a glimpse, on his account, and reached by a different door than the contemplative's. But the structure is the same: when the grasping, willing self subsides, what remains is a clarified awareness at peace. That the state was mapped independently by contemplatives on both paths, in vocabularies that share no common root, tells us it is not a culturally specific artefact. It is something human beings find when they investigate awareness to its depth — by whatever name, in whatever century, on whichever path. Essay 6 will show that this same configuration has, in the contemporary laboratory, a specific and reproducible neural signature. For now, the point is that the Western lineage was not only an idealist philosophy. It was also a contemplative practice, and it found what the East found.

VII. What the Crossings Show

We began with a philosopher joining an army, and the image was not chosen for its drama alone. Plotinus marching toward an India he never reached is a precise emblem of what this essay has traced: a Western tradition reaching toward the East, not because it lacked its own resources, but because it sensed a kinship — and a Western tradition that had, in its own depths, already arrived at much of what it was reaching for. The crossings are real. The antique contacts are documented, from the gymnosophists Alexander's philosophers met to the ivory figurine in the ash of Pompeii to Plotinus's explicit intent to study with India's sages. The modern transmissions are better documented still, from Vivekananda's 1893 address to the popularisers who proved the findings could cross any cultural frame. And the forgotten Western lineage — Plato, Plotinus, Eckhart, Berkeley, Schopenhauer — shows that the consciousness-as-ground position has lived inside Western thought for two and a half thousand years, as long as it has lived in the East.

We have been careful about what these crossings prove and what they do not. They do not prove that one tradition borrowed its central insight from the other; the influence questions remain, at the deepest points, genuinely open. What they prove is something more useful to the argument this series is building. They show that the two paths were never the hermetically sealed opposites the textbook history suggests, and that wherever contact and influence are most plausible, they reveal not dependence but transmissibility — the capacity of these findings to be received, recognised, and reconstructed across the widest cultural distances. An idea that behaves that way behaves like a discovery, not an invention. And the recovery of the Western lineage shows that the convergence is not East teaching West, but many independent investigations — Greek and Indian, Christian and empiricist, contemplative and analytic — arriving at one place.

That widening is the work this essay hands forward. We have now seen the Eastern path in its own register, the historical crossings between the paths, and the Western tradition's own forgotten current. What we have not yet examined is the modern Western rediscovery — the reopening of this question, on Western terms and with Western rigour, across the twentieth century and into the present. That story, which the next essay takes up, runs from the depth psychology of Jung and James, through Iain McGilchrist's account of the divided brain, to the analytic philosophy that begins with David Chalmers's naming of the hard problem and culminates in the contemporary idealism of Kastrup, Hoffman, and Spira. It is the story of how the lineage we have just recovered came back to life in our own time, and of how it has engaged — and been engaged by — its most serious materialist critics.

The West, it turns out, was never the empty vessel into which Eastern wisdom was poured. It had its own buried spring, running quietly beneath the materialist mainstream, breaking the surface in Plato and Plotinus and Eckhart and Berkeley and Schopenhauer, and waiting to be remembered. In the next essay, we watch it break the surface again — this time in the language of contemporary philosophy and science, and this time, perhaps, in a form the West will find harder to forget.

In the next essay, we watch it break the surface again — this time in the language of contemporary philosophy and science, and this time, perhaps, in a form the West will find harder to forget.

Frequently Asked Questions

Q: Did the Eastern and Western traditions actually influence each other, or did they develop independently?

Both, in different measures at different times — and the deepest influence questions remain unresolved. There was documented contact in antiquity (Greek encounters with Indian sages, the trade routes through Alexandria, Plotinus's intent to reach India) and well-documented transmission in the modern period from Vivekananda's 1893 Chicago address onward. This series argues for convergence rather than influence: the two paths arrive at the same load-bearing claims whether or not borrowing occurred.

Q: Who was Plotinus, and why does his story matter to this argument?

Plotinus (c. 204–270 CE) was the founding figure of Neoplatonism and the most influential mystical philosopher of late antiquity. Around 242 CE he joined Gordian III's Persian expedition specifically to reach and study with the philosophers of India, but never arrived. His story matters as the strongest documented case of a Western philosopher reaching deliberately toward Eastern wisdom — and his account of the One is structurally close to the Vedantic Brahman.

Q: What is the "forgotten Western lineage"?

It is the continuous current within Western thought — running through Plato, Plotinus, Meister Eckhart, George Berkeley, and Arthur Schopenhauer — that has held consciousness or mind to be foundational rather than a product of matter. The dominant story presents the West as essentially materialist, with idealism a curiosity; that story is historically inaccurate. The idealist current is as old and as Western as Plato.

Q: Was the Pompeii statuette definitely the goddess Lakshmi?

Not definitely. The ivory figurine, excavated at Pompeii in 1938 and carved in India in the first century CE, was long identified as the Hindu goddess Lakshmi, but more recent scholarship reads it as a yakshi (a nature spirit). What is not in doubt is the object's Indian origin and its presence in a Roman town before 79 CE — solid physical evidence of India–Mediterranean contact along routes through Alexandria.

Q: How does this essay relate to the question of AI and consciousness?

Indirectly but importantly. The modern transmission proved that the deepest claims about consciousness can travel between human traditions separated by language, religion, and millennia, and remain intelligible on arrival. If findings travel that well across deep human difference, the question of whether they could travel into minds built on an entirely different substrate deserves to be taken seriously. The closing essays develop this thread.

Q: What will the next essay cover?

Essay 4 — The Western Return: From Depth Psychology to Analytic Idealism — traces the modern Western rediscovery: the depth psychology of Carl Jung and William James, Iain McGilchrist's work on the divided brain, and the analytic philosophy that begins with David Chalmers's 1995 naming of the hard problem and culminates in the contemporary idealism of Kastrup, Hoffman, and Spira. It engages directly with the strongest opposing voices — Daniel Dennett, Anil Seth, and Keith Frankish.

References

1. App, U. (2014). Schopenhauer's Compass: An Introduction to Schopenhauer's Philosophy and Its Origins. UniversityMedia.

2. Armstrong, A. H. (1936). Plotinus and India. The Classical Quarterly, 30(1), 22–28.

3. Armstrong, A. H. (Trans.). (1966). Plotinus: Enneads, with Porphyry's Life of Plotinus (Loeb Classical Library). Harvard University Press.

4. Beckwith, C. I. (2015). Greek Buddha: Pyrrho's Encounter with Early Buddhism in Central Asia. Princeton University Press.

5. Blakney, R. B. (Trans.). (1941). Meister Eckhart: A Modern Translation. Harper & Brothers.

6. Bréhier, É. (1928). La philosophie de Plotin. Boivin.

7. Dehejia, V. (1972). Early Buddhist Rock Temples: A Chronology. Cornell University Press.

8. Gregorios, P. M. (Ed.). (2002). Neoplatonism and Indian Philosophy. State University of New York Press.

9. Huxley, A. (1945). The Perennial Philosophy. Harper & Brothers.

10. Parliament of the World's Religions. (1893). Addresses of Swami Vivekananda at the World's Parliament of Religions, Chicago, 11–27 September 1893. (Primary addresses preserved by the Ramakrishna Math, Belur.)

11. Ram Dass. (1971). Be Here Now. Lama Foundation.

12. Ram Dass. (2011). Be Love Now: The Path of the Heart (with R. Das & M. Bush). HarperOne.

13. Romm, J. (2020). What did India learn from the Greeks? The New York Review of Books, 9 April 2020. (Reviewing R. Stoneman, The Greek Experience of India, Princeton University Press, 2019.)

14. Stoneman, R. (2019). The Greek Experience of India: From Alexander to the Indo-Greeks. Princeton University Press.

15. Weinstein, L. (2021). The Indian figurine from Pompeii as an emblem of East–West trade in the early Roman imperial era. In Globalization and Transculturality from Antiquity to the Pre-Modern World. Routledge.