Grammatical Analysis
Saḷāyatana: [nt.] The six sense bases. Formed by saḷ (six) + āyatana (sense base/gateway). Specifically designates the six internal sensory apparatuses when operating within the chain of Dependent Origination.
Orthodox Definition
In the twelve-fold chain of Dependent Origination (paṭiccasamuppāda), saḷāyatana constitutes the fifth link, conditioned directly by mentality-materiality (nāmarūpa-paccayā saḷāyatanaṃ) and acting as the direct cause for contact (saḷāyatana-paccayā phasso).
While the term āyatana broadly covers both internal and external elements of the grid, saḷāyatana focuses strictly on the development and deployment of the six internal subjective functional fields (eye, ear, nose, tongue, body, mind) inside a living being.
The commentaries point out that during embryonic development, physical matter (rūpa) and sub-cognitive mental factors (nāma) combine to construct these six specialized physical organs and the mental coordination center (manāyatana). Once completed, this six-fold sensory grid opens the creature up to collide directly with the external cosmos.
Textual References
- Sutta: Salāyatana Sutta (SN 35.1) – Foundational texts mapping the impermanence and burning nature of the six sensory fields.
- Abhidhamma: Vibhaṅga (Paticcasamuppāda-vibhaṅga analysis).
- Commentary: Sammohavinodanī – Exhaustive structural tracing of how the six internal gates mature under the laws of past karmic momentum.