Yathā ca nadiyā soto mahoghabhāvena pavattamāno uḷumpaṃ vā nāvaṃ vā bandhituṃ netuṃ ca chekaṃ purisaṃ nissāya paratīraṃ gantuṃ ajjhāsayaṃ katvā tajjaṃ vāyāmaṃ karontena taritabbo, na yena vā tena vāti duruttaro, evaṃ taṇhāsotopi kāmoghabhavoghabhūto sīlasaṃvaraṃ pūretuṃ samathavipassanāsu kammaṃ kātuṃ "nipakena arahattaṃ pāpuṇissāmī"ti ajjhāsayaṃ samuṭṭhāpetvā kalyāṇamitte nissāya samathavipassanānāvaṃ abhiruhitvā sammāvāyāmaṃ karontena taritabbo, na yena vā tena vāti duruttaro. Evaṃ anukkamaparivuḍḍhito anuppabandhato osīdāpanato duruttaraṇatoti catūhi ākārehi taṇhāya nadīsotasadisatā veditabbā.
Piyarūpaṃ sātarūpanti piyajātikaṃ piyasabhāvaṃ piyarūpaṃ, madhurajātikaṃ madhurasabhāvaṃ sātarūpaṃ, iṭṭhasabhāvanti attho. Channetanti channaṃ etaṃ. Ajjhattikānanti ettha "evaṃ mayaṃ attāti gahaṇaṃ gamissāmā"ti iminā viya adhippāyena attānaṃ adhikāraṃ katvā pavattānīti ajjhattikāni. Tattha gocarajjhattaṃ niyakajjhattaṃ visayajjhattaṃ ajjhattajjhattanti catubbidhaṃ ajjhattaṃ. Tesu "ajjhattarato samāhito"ti evamādīsu vuttaṃ idaṃ gocarajjhattaṃ nāma. "ajjhattaṃ sampasādanan"ti āgataṃ idaṃ niyakajjhattaṃ nāma. "sabbanimittānaṃ amanasikārā ajjhattaṃ suññataṃ upasampajja viharatī"ti evamāgataṃ idaṃ visayajjhattaṃ nāma. "ajjhattikā dhammā, bāhirā dhammā"ti ettha vuttaṃ ajjhattajjhattaṃ nāma. Idhāpi etadeva adhippetaṃ, tasmā ajjhattāniyeva ajjhattikāni. Atha vā yathāvutteneva atthena "ajjhattā dhammā, bahiddhā dhammā"tiādīsu viya tesu ajjhattesu bhavāni ajjhattikāni, cakkhvādīni. Tesaṃ ajjhattikānaṃ.
Āyatanānanti ettha āyatanato, āyānaṃ tananato, āyatassa ca nayanato āyatanānīti. Cakkhvādīsu hi taṃtaṃdvāravatthukā cittacetasikā dhammā sakena sakena anubhavanādinā kiccena āyatanti uṭṭhahanti ghaṭanti vāyamanti, te ca āyabhūte dhamme etāni tanonti vitthārenti, yañca anamatagge saṃsāre pavattaṃ ativiya āyataṃ vaṭṭadukkhaṃ, taṃ nayanti pavattenti. Iti sabbathāpime dhammā āyatanato, āyānaṃ tananato, āyatassa ca nayanato āyatanānīti vuccanti. Apica nivāsanaṭṭhānaṭṭhena ākaraṭṭhena samosaraṇaṭṭhānaṭṭhena sañjātidesaṭṭhena kāraṇaṭṭhena ca āyatanaṃ veditabbaṃ. Tathā hi loke "issarāyatanaṃ devāyatanan"tiādīsu nivāsaṭṭhānaṃ āyatananti vuccati. "suvaṇṇāyatanaṃ rajatāyatanan"tiādīsu ākaro. Sāsane pana "manorame āyatane, sevanti naṃ vihaṅgamā"tiādīsu samosaraṇaṭṭhānaṃ. "dakkhiṇāpatho gunnaṃ āyatanan"tiādīsu sañjātideso. "tatra tatreva sakkhibhabbataṃ pāpuṇāti sati