Tathāhi ayaṃ kāye kāyānupassanāpaṭipadaṃ paṭipanno bhikkhu imaṃ kāyaṃ aniccānupassanādīnaṃ sattannaṃ anupassanānaṃ vasena aniccato anupassati, no niccato. Dukkhato anupassati, no sukhato. Anattato anupassati, no attato. Nibbindati, no nandati. Virajjati, no rajjati. Nirodheti, no samudeti. Paṭinissajjati, no ādiyati. So taṃ aniccato anupassanto niccasaññaṃ pajahati, dukkhato anupassanto sukhasaññaṃ pajahati, anattato anupassanto attasaññaṃ pajahati, nibbindanto nandiṃ pajahati, virajjanto rāgaṃ pajahati, nirodhento samudayaṃ pajahati, paṭinissajjanto ādānaṃ pajahatīti veditabbo.

Viharatīti iriyati. Ātāpīti tīsu bhavesu kilese ātāpetīti ātāpo, viriyassetaṃ nāmaṃ. Ātāpo assa atthīti ātāpī. Sampajānoti sampajaññasaṅkhātena ñāṇena samannāgato. Satimāti kāyapariggāhikāya satiyā samannāgato. Ayaṃ pana yasmā satiyā ārammaṇaṃ pariggahetvā paññāya anupassati, na hi sativirahitassa anupassanā nāma atthi. Tenevāha "satiṃ ca khvāhaṃ bhikkhave sabbatthikaṃ vadāmī"ti. Tasmā ettha "kāye kāyānupassī viharatī"ti ettāvatā kāyānupassanāsatipaṭṭhāna- kammaṭṭhānaṃ vuttaṃ hoti. Athavā yasmā anātāpino antosaṅkhepo antarāyakaro hoti, asampajāno upāyapariggahe anupāyaparivajjane ca sammuyhati, muṭṭhassati upāyapariggahe anupāyapariccāge ca asamattho hoti, tenassa taṃ kammaṭṭhānaṃ na sampajjati, tasmā yesaṃ dhammānaṃ ānubhāvena taṃ sampajjati. Tesaṃ dassasanatthaṃ "ātāpī sampajāno satimāti idaṃ vuttan"ti veditabbaṃ.

@3 saṃ. mahā. 19/234/102 aggisutta