Kammatthāna Majjhima Baeb Lamdub

Kammatthāna Majjhima Baeb Lamdub (กรรมฐานมัชฌิมาแบบลำดับ; literally “Progressive Mind-Training in the Middle Way Employing Meditation Subjects”) is an 18th-century Thai meditation manual belonging to the pre-reform borān kammaṭṭhāna (“ancient meditation practice”) tradition of Theravāda Buddhism. The text is preserved at Wat Ratchasittharam in Bangkok and is traditionally attributed to the Thai Supreme Patriarch Suk Kaitheun (1733–1822), one of the most influential meditation masters of the early Rattanakosin period.^[1]

The manual presents a step-by-step system of mindfulness-of-breathing (ānāpānasati) that differs markedly from both the classical Visuddhimagga method and modern vipassanā movements. Distinctive features include:

• Heavy emphasis on the arising of luminous mental signs (nimitta)
• Specific bodily loci for concentration
• A rich technical vocabulary drawn from older Tai meditation lineages
• Integration of recollection of the Buddha’s qualities (buddha-guṇa) as preparatory practice

The practice is explicitly described as “middle-way” (majjhima) – avoiding both extreme sensual indulgence and harsh asceticism – and is structured in clearly numbered progressive stages.^[2]

The lineage is traced to the late Ayutthaya period and was transmitted through Thonburi into the Bangkok era. Somdet Suk Kaitheun, who served as Supreme Patriarch under Kings Rama I and Rama II, is regarded as the key figure who systematised and taught this method at Wat Ratchasittharam. The surviving manuscript is therefore considered one of the most authentic witnesses to pre-19th-century Thai forest-meditation traditions before the reforms of Rama IV and the rise of the Dhammayuttika Nikaya.^[3]

Although the method is no longer widely taught, it has attracted renewed scholarly interest as evidence of the diversity and richness of older Theravāda meditation systems in mainland Southeast Asia. The only full English translation and detailed analysis was published by Andrew Skilton and Phibul Choompolpaisal in 2015, making the text accessible to contemporary researchers for the first time.^[4]

The Kammatthāna Majjhima Baeb Lamdub thus serves as an important bridge between the classical Pali commentarial tradition and the living, esoteric meditation practices that once flourished across Thailand, Laos, and Cambodia.

• Skilton, Andrew; Choompolpaisal, Phibul (2015). "The ancient Theravāda meditation system, borān kammaṭṭhāna: Ānāpānasati or ‘mindfulness of the breath’ in Kammatthan Majjima Baeb Lamdub". Buddhist Studies Review.
• Choompolpaisal, Phibul (2021). "Boran Kammatthan (Ancient Theravāda) Meditation Transmissions in Siam from late Ayutthaya to Rattanakosin periods". Buddhist Studies Review.