Verified
Grammatical Analysis
Tejodhātu: [f.] fire element; element of heat; temperature. Formed by tejo (fire, heat, flame, thermal energy) + dhātu (element).
Orthodox Definition
Tejodhātu is the third of the four great physical elements (mahābhūta). It represents the abstract material principle of temperature, heat, cold, and maturation.
The commentaries note that its characteristic is heat (uṇhatta-lakkhaṇā)—which technically encompasses the entire spectrum from extreme heat to extreme cold. Its specific function is to mature, ripen, or consume other material phenomena (paripācana-rasā). It is the thermal energy that causes physical matter to age, decay, and transform.
Internally, the Buddha identified four primary manifestations of the fire element within the biological body:
- The heat that warms the body.
- The heat that causes the body to age and wither.
- The feverish heat generated during illness.
- The digestive fire that burns up, consumes, and metabolizes food and drink.
Quote
katamā ca, bhikkhu, tejodhātu?
“And what, bhikkhu, is the fire element?”tejodhātu siyā ajjhattikā siyā bāhirā.
“The fire element may be internal or it may be external.”katamā ca, bhikkhu, ajjhattikā tejodhātu?
“And what, bhikkhu, is the internal fire element?”yaṃ ajjhattaṃ paccattaṃ tejo tejogataṃ upādinnaṃ, seyyathidaṃ – yena ca santappati, yena ca jīrīyati, yena ca pariḍayhati, yena ca asitapītakhāyitasāyitaṃ sammā pariṇāmaṃ gacchati, yaṃ vā panaññampi kiñci ajjhattaṃ paccattaṃ tejo tejogataṃ upādinnaṃ – ayaṃ vuccati, bhikkhu, ajjhattikā tejodhātu.
“That which is internal, personal, fiery, heat-related, and clung to, such as – that by which one is warmed, by which one ages, by which one is consumed, by which what has been eaten, drunk, chewed, and tasted is properly digested, or any other thing whatsoever that is internal, personal, fiery, heat-related, and clung to – this, bhikkhu, is called the internal fire element.”yā ceva kho pana ajjhattikā tejodhātu yā ca bāhirā tejodhātu tejodhāturevesā.
“Both the internal fire element and the external fire element are just the fire element.”‘taṃ netaṃ mama, nesohamasmi, na meso attā’ti – evametaṃ yathābhūtaṃ sammappaññāya daṭṭhabbaṃ.
“‘This is not mine, I am not this, this is not my self’ – this should be seen as it really is with right wisdom.”evametaṃ yathābhūtaṃ sammappaññāya disvā tejodhātuyā nibbindati, tejodhātuyā cittaṃ virājeti.
“Having seen this as it really is with right wisdom, one becomes disenchanted with the fire element, one detaches the mind from the fire element.”— Dhātuvibhaṅga Sutta (MN 140)
Textual References
- Sutta: Dhātuvibhaṅga Sutta (MN 140) – Explicitly defining the internal fire element primarily through the mechanism of biological digestion and bodily warmth.
- Abhidhamma: Dhammasaṅgaṇī (Classification of the tangible base).
- Commentary: Visuddhimagga (Chapter XI) – Clarifying that both physical heat and physical cold are expressions of this single thermal element.