Reading guide
The other half of the twelve sense bases
"Sights are impermanent, decaying, and perishing. Sounds, smells, tastes, touches, and ideas are impermanent, decaying, and perishing" — together with SN 25.1's six internal faculties, these six external objects complete the classic twelve āyatana (six internal plus six external), the standard analytical framework for sense experience used throughout the Nikāyas.
The formula, still word for word
The three-tier definition — faith-follower, teaching-follower, stream-enterer — repeats without a single word changed from SN 25.1, confirming this saṃyutta's own working method: one fixed conclusion, reapplied to a new opening list each time.
Why sense objects get their own discourse rather than being folded into SN 25.1
Internal faculties and external objects are treated as two distinct analytical categories throughout the Nikāyas, even though they are always discussed as a pair — this saṃyutta's decision to give each its own discourse, rather than merging them into a single twelve-item list, mirrors that standard separation.
Eight categories still to come
This saṃyutta's remaining eight discourses will proceed through the standard chain that builds on faculty and object: consciousness, contact, feeling, perception, intention, craving, the physical elements, and finally the five aggregates themselves.
Key terms
The text
§1At Sāvatthī. “Mendicants, sights are impermanent, decaying, and perishing. Sounds, smells, tastes, touches, and ideas are impermanent, decaying, and perishing. Someone who has faith and confidence in these teachings is called a follower by faith. They’ve stepped into the sure path, they’ve stepped into the level of the true person, and they’ve passed beyond the level of the untrue person. They can’t do any deed which would make them be reborn in hell, the animal realm, or the ghost realm. They can’t die without realizing the fruit of stream-entry.
§2Someone who accepts these teachings after deliberating them with a degree of wisdom is called a follower of teachings. They’ve stepped into the sure path, they’ve stepped into the level of the true person, and they’ve passed beyond the level of the untrue person. They can’t do any deed which would make them be reborn in hell, the animal realm, or the ghost realm. They can’t die without realizing the fruit of stream-entry. Someone who understands and sees these principles is called a stream-enterer, not liable to be reborn in the underworld, assured, destined for awakening.”
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