Boran Kammatthana Tradition of Samatha Meditation

For centuries, Theravada Buddhism carried a powerful practice of meditation which was unfortunately suppressed, driven underground, and nearly extinguished. Today, a small circle of scholars, teachers, and practitioners is racing to bring it back. In this article, we discuss about that nearly forgotten tradition.

Photo by Dingzeyu Li on Unsplash

A Tradition Hidden

Walk into almost any meditation center in the world today and you will encounter some version of vipassana: noting sensations, observing thoughts, cultivating bare awareness. It’s elegant, portable, teachable to large groups. Since the 1950s it has become the face of Buddhist meditation globally. But this is not what Theravāda Buddhism looked like for most of its history.

Before the 19th-century reforms that reshaped Southeast Asian Buddhism, the dominant contemplative practice was something far more intricate and considerably stranger. Known in Thai as boran kammatthana (literally “ancient meditation subjects”), it combined deep concentration (samatha), insight (vipassana), visualization, and something resembling an inner alchemical process, all woven into a single path. Scholar Lance Cousins gave it the name “Esoteric Southern Buddhism.” Researcher Kate Crosby, whose 2020 book Esoteric Theravada is the definitive modern account, describes it as a system that “achieves both the samatha and vipassana outcomes” through methods that go far beyond sitting quietly and noting the breath.

This is the story of where it came from, how it almost disappeared, and what a handful of aging masters and determined scholars are doing about it.

What Boran Kammatthana Actually Was

The centerpiece of boran practice is jhana: states of meditative absorption in which the ordinary chatter of the mind grows still and the meditator enters a unified, luminous field of awareness. But the boran approach to getting there, and to what you do once you arrive, is unlike anything you would find in a standard retreat center today.

Practice begins conventionally enough. The meditator focuses on the breath until the mind grows quiet and a luminous mental image arises, the nimitta, often described as a glowing orb or bright light. What happens next is where things get unusual.

Rather than simply resting in that absorbed state, the meditator internalizes the nimitta, drawing it into the body. Sacred syllables or visualized letters may be incorporated. The practitioner then “invites” refined mental qualities, piti (rapture) and sukha (bliss), as honored presences, coaxing them to manifest and intensify. Through this ritualized process, the body itself is said to be transformed, purified from within. Advanced practitioners speak of visualizing a sequence of increasingly refined “crystal bodies” nested inside themselves, each representing a higher level of attainment.

The goal is not just psychological calm or philosophical insight. It is transformation, the forging of what the texts describe as an enlightened body and mind, “a Buddha within the practitioner’s womb.” Crosby observes that while mainstream Theravada uses jhana to contemplate impermanence and non-self from a position of detached clarity, the borān method actively harnesses jhānic energy to change the practitioner at a more fundamental level.

To some people, this sounds more like Vajrayana tantra than the austere rationalism usually associated with Theravada. The comparison isn’t accidental, but scholars are at pains to point out it’s also somewhat misleading. The boran system is deeply grounded in Abhidhamma, the systematic Buddhist psychology of mind and matter, and frames its techniques entirely within Theravāda vocabulary. It didn’t borrow from tantra; it arrived at similar terrain by a different road.

Royal Courts and Forgotten Manuals

The most important thing to understand about boran kammatthana is that it was not a fringe movement or a folk deviation. For several centuries, it was the mainstream meditation tradition in Thailand and other countries.

Crosby documents that this “old meditation” tradition “was established and promoted by royalty and by the supreme patriarchs of the Buddhist sangha” across the regions that became Thailand, Cambodia, Laos, and Sri Lanka. Kings patronized it. State monasteries taught it. The highest abbots practiced it. You cannot make sense of pre-modern Theravada without reckoning with this.

The historical record, while fragmented, is substantial. A Thai meditation treatise from around 1783, the Kammaṭṭhāna Majjima Baeb Lamdub, details a breath meditation method within the borān system. A 16th-century inscription at Phitsanulok records a dhammakaya visualization liturgy that researchers have linked to the same tradition. The Yogavacara’s Manual, an untitled Sinhala meditation guide published by the Pali Text Society in 1896 with no known author or date, describes elemental visualizations and concentration techniques that fit unmistakably within this current of practice. Crosby traces the Thai and Lao borān lineage back at least to the early 16th century. The tradition is likely older still.

The idea that Theravāda has always been a rationalistic, insight-focused tradition is a modern construction. The esoteric, body-involving practices now considered exotic were, for a long time, simply what serious practitioners did.

Three Waves of Suppression

The unraveling of boran kammatthana happened in stages, across roughly a century and a half.

The reformers. In 19th-century Siam (Thailand), King Mongkut (the monarch better known in the West as the subject of The King and I) had himself been trained in the old esoteric methods as a monk. He knew them from the inside. Perhaps for that reason, when he founded the reforming Dhammayuttika Nikaya and worked to modernize Thai Buddhism, he also set about dismantling what he had learned. Mongkut viewed the magical-ritual elements of the practice as superstition incompatible with a rational, text-based religion. His successors continued the work. Prince Wachirayan, who served as Supreme Patriarch from 1910 to 1921, promoted a meditation curriculum focused on bare insight and actively purged the esoteric curricula from monk training programs.

The colonial influence. In the British and French colonized territories of Ceylon, Burma, and Cambodia, something more interesting happened. As Crosby explains, Southeast Asian Buddhists who wanted to strengthen their religion against colonial pressures ended up internalizing the colonizers’ preference for rationality and scripture over embodiment and ritual. Buddhist modernists remade their tradition in a Protestant image: text-based, intellectually respectable, stripped of magic. The practices that didn’t fit, and boran kammatthana with its invocations, subtle body work, and Ayurvedic references most certainly didn’t fit, were quietly abandoned or actively suppressed. In some regions, indigenous medicine was briefly outlawed, cutting off the livelihood of the same practitioners who had been transmitting the esoteric meditations.

The vipassana revolution. The final blow came from within Buddhism itself. Starting in the 1950s, Burmese teachers like Mahasi Sayadaw and U Ba Khin popularized a form of dry insight, intensive observation of bodily sensations and mental phenomena, that required only minimal concentration and could be taught efficiently to large groups of laypeople in week-long courses. It was presented as modern, democratic, and scientifically respectable. It spread with extraordinary speed across Asia and then to the West.

Against this tide, boran kammatthana had no chance. It required lengthy one-on-one transmission, years of training, and an intact lineage. By mid-century, it had been largely displaced even in its home countries. In Thailand, most monks were no longer trained in jhana at all. The complex technical vocabulary of the old system, the nimittas, the crystal bodies, the internal Buddha, had become obscure even to dedicated practitioners.

A tradition that had once been patronized by kings was hiding in rural temples, passed between aging masters and a dwindling number of students.

Nai Boonman and the Western Lifeline

In 1960, a young Thai ex-monk named Nai Boonman Poonyathiro arrived in England. He had been trained at Wat Pailom in the old samatha method: breath meditation paired with silent repetition of “Buddho,” proceeding step by step through stages of joy, calm, and absorption. He hadn’t come to England to teach. But he encountered Westerners hungry for something real.

What followed was one of the more quietly extraordinary episodes in the history of Buddhism’s transmission to the West. The small group Boonman gathered around him eventually formalized as the Samatha Trust, established in 1973. While the wider world was discovering Zen, while Tibetan teachers were drawing large audiences, while the vipassana retreat circuit was beginning to take shape, a modest organization in Britain was preserving a pre-reform Thai meditation method that had nearly ceased to exist even in Thailand.

Among Boonman’s earliest students was Lance Cousins, a Pali scholar who would become one of the most important academic authorities on Buddhist meditation. Cousins (1942–2015) embodied a rare combination: he was both a practitioner trained by Boonman and a researcher who could trace the historical roots of what he was practicing. His 1997 paper on Esoteric Southern Buddhism was among the first scholarly treatments to take the tradition seriously on its own terms.

The Samatha Trust continues to teach today. Its method is deliberately singular: one inherited technique, transmitted with close teacher feedback, trained over years rather than weeks. Senior teacher Paul Dennison, a student of both Cousins and Boonman, has written Jhana Consciousness: Buddhist Meditation in the Age of Neuroscience (2022), documenting the method and reporting on EEG studies of practitioners in absorbed states.

Those who have practiced within this lineage report something the modern retreat circuit rarely produces: intense involuntary physical responses during deep absorption, shaking, trembling, the body moving in ways outside ordinary motor control. Whether you frame these experiences spiritually or physiologically, they suggest that something qualitatively different is happening from the relaxation and equanimity that mindfulness training typically promises.

Nai Boonman, now in his nineties, is retired from active teaching. But he was still traveling from Thailand to lead retreats for the Samatha Trust as recently as the 2010s, a living thread connecting a nearly lost world to the present.

The Scholars Racing Against Time

French scholar François Bizot began the academic work in the 1970s, studying Cambodian meditation manuscripts and practices at sites connected with Angkor. His findings revealed a sophisticated Theravāda yogic tradition that startled Buddhist studies scholars who had assumed the tradition was philosophically tidy and non-esoteric. The field has never entirely recovered its earlier certainties.

Kate Crosby’s Esoteric Theravada (2020) is the most comprehensive account to date, a synthesis of historical, textual, and ethnographic evidence that makes a sustained case both for the tradition’s importance and its alarming fragility. Crosby doesn’t just document boran kammatthana; she explicitly urges that it be recorded “for posterity, and maybe even revived.” She writes with urgency, aware that with each passing year, more knowledge holders die and more manuscripts go unstudied.

Her central argument is both simple and consequential. The assumption that vipassana-style insight meditation is “traditional” Theravada while jhana-centered, body-involving practices are deviations or later corruptions gets the history exactly backwards. The body-involving, transformative practices came first. The stripped-down insight methods are the modern innovation. This reframing has started to matter to practitioners, not just academics. If the old methods are organically Theravada, grounded in Abhidhamma and practiced in royal courts across centuries, then pursuing them isn’t heterodox. It is, in a meaningful sense, a return.

Parallel Currents: Other Hidden Jhana Traditions

Boran kammatthana sits within a broader landscape of jhana-oriented practice that has been largely invisible in modern times.

The Pa-Auk system in Myanmar represents the conservative end of the spectrum: a rigorous jhana curriculum derived directly from the Visuddhimagga, training meditators through all eight absorption states before turning to insight. Pa-Auk Sayadaw’s monastery began drawing thousands of practitioners in the 1990s, positioning itself as a counterweight to the dry-insight mainstream. Where boran kammatthana works with inner Buddhas, radiating elements, and visualized syllables, Pa-Auk is austere and text-bound. But both insist that jhana is not optional.

The Thai Forest Tradition is a more ambiguous case. Masters like Ajahn Mun (1870–1949) taught intensive concentration practice using the “Buddho” mantra, the same foundational technique as Nai Boonman’s method. Ajahn Chah reportedly taught jhana to advanced students, though “not publicly,” using terminology carefully chosen to avoid controversy. The Forest lineage and the borān tradition share deep roots and likely share some techniques, but the Forest masters generally stepped back from the ritualistic and cosmological dimensions of the old esoteric system, producing a more streamlined jhana training. Ajahn Brahmavamso, a famous monk scholar and meditation expert originally trained from Ajahn Chah’s monastery, exemplifies this kind of Jhana training in his book Mindfulness Bliss and Beyond: a meditator’s Handbook.

In Cambodia and Laos, boran practices have survived most durably but in their most transformed state, embedded in ritual healing, protective chanting, and folk-Buddhist culture that escaped reformist censure precisely by not looking like formal meditation. Rural monks who enter trance states to perform protective ceremonies, achuar lay ritual experts working with visualization practices that would be recognizable to any borān practitioner: these are the unlikely custodians of the tradition. Part of what Crosby and other scholars are doing is reaching out to such people before their knowledge disappears entirely.

Why It Matters

Modern mindfulness, for all its demonstrable benefits, has a ceiling. It is genuinely good at reducing stress, improving attention, and cultivating a kind of calm evenness. But the classical Buddhist texts describe the meditation path in terms of profound alterations of consciousness, transformed perception, states that seem categorically different from ordinary relaxed awareness. Boran kammatthana and its related traditions claim to offer a route to those deeper states, though one that requires a complete transmission rather than just a technique.

Crosby describes what the tradition works at as “the intersection of mental states and subtle materiality,” territory that modern mindfulness training mostly ignores. The underlying claim is that there is more available than what the last several decades of Buddhist meditation have been offering.

The problem is that time is running out. A complex practice technology needs skilled transmitters. With only a handful of aging masters still active, the manuscripts still mostly unread in temple libraries, the knowledge holders dying faster than researchers can reach them, the window for meaningful revival is narrow.

What the scholars are doing is buying time. What the practitioners trained by Nai Boonman are doing is demonstrating that the methods still work. What happens next depends on whether those two efforts can find each other in time.

References

• Kate Crosby, Esoteric Theravada: The Story of the Forgotten Meditation Tradition of Southeast Asia (Shambhala, 2020)
• Paul Dennison, Jhana Consciousness: Buddhist Meditation in the Age of Neuroscience (2022)
• Lance Cousins, “Aspects of Esoteric Southern Buddhism” in Indian Insights (Luzac Oriental, 1997)
• Wendy Biddlecombe Agsar, “The Jhana Underground,” Tricycle: The Buddhist Review, Fall 2022
• The Yogavacara’s Manual, edited by T.W. Rhys Davids (Pali Text Society, 1896)
• Skilton, A., & Choompolpaisal, P. (2015). The ancient Theravada meditation system, boran kammatthana: Anapanasati or ‘mindfulness of the breath’ in kammatthan majjima baeb lamdub. Buddhist Studies Review, 32(2), 207–229.
• Brahm, A., & Kornfield, J. (2006). Mindfulness, bliss, and beyond: A meditator’s handbook.
• Malasart, W. (2023). Visualising the Dhammakaya through a Buddha Image: The Dhammakaya Text and Its Significance for Traditional Tai–Khmer Buddhist Practices. Religions 14: 1446.
• Jeon, H. S. (2018). Samatha, Jhana, and Vipassana: Practice at the Pa-Auk Monastery: A Meditator’s Experience (Vol. 1). Simon and Schuster.