Vimocayaṃ cittanti paṭhamajjhānena nīvaraṇehi cittaṃ mocento vimocento, dutiyena vitakkavicārehi, tatiyena pītiyā, catutthena sukhadukkhehi cittaṃ mocento vimocento, tāni vā pana jhānāni samāpajjitvā vuṭṭhāya jhānasampayuttaṃ cittaṃ khayato vayato sammasati. So vipassanākkhaṇe aniccānupassanāya niccasaññāto cittaṃ mocento vimocento, dukkhānupassanāya sukhasaññāto, anattānupassānāya attasaññāto, nibbidānupassanāya nandito, virāgānupassanāya rāgato, nirodhānupassanāya samudayato, paṭinissaggānupassanāya ādānato cittaṃ mocento vimocento assasati ceva passasati ca. Tena vuccati "vimocayaṃ cittaṃ assasissāmi passasissāmīti sikkhatī"ti. Evaṃ cittānupassanāvasena idaṃ catukkaṃ bhāsitanti veditabbaṃ.

Catutthacatukke pana aniccānupassīti ettha tāva aniccaṃ veditabbaṃ, aniccatā veditabbā, aniccānupassanā veditabbā, aniccānupassī veditabbo. Tattha aniccanti pañcakkhandhā. Kasmā? uppādavayaññathattabhāvā. Aniccatāti tesaṃyeva uppādāyaññathattaṃ, hutvā abhāvo vā, nibbattānaṃ tenevākārena aṭṭhatvā khaṇabhaṅgena bhedoti attho. Aniccānupassanāti tassā aniccatāya vasena rūpādīsu "aniccan"ti anupassanā. Aniccānupassīti tāya anupassanāya samannāgato. Tasmā evaṃ bhūto assasanto ca passasanto ca idha "aniccānupassī assasissāmīti sikkhatī"ti veditabbo.

Virāgānupassīti ettha pana dve virāgā khayavirāgo ca accantavirāgo ca. Tattha khayavirāgoti saṅkhārānaṃ khaṇabhaṅgo. Accantavirāgoti nibbānaṃ. Virāgānupassanāti tadubhayadassanavasena pavattā vipassanā ca maggo ca. Tāya duvidhāyapi anupassanāya samannāgato hutvā assasanto ca passasanto ca "virāgānupassī assasissāmi passasissāmīti sikkhatī"ti veditabbo. Nirodhānupassīpadepi eseva nayo.