[408] How does one train thus: "Experiencing rapture (pīti) I shall breathe out"; how does one train thus: "Experiencing rapture I shall breathe in"?
What is rapture? For one who knows the mind's (citta) one-pointedness and non-distraction by way of long out-breaths, rapture and gladness arise … For one who knows the mind's one-pointedness and non-distraction by way of long in-breaths, rapture and gladness arise … By way of short out-breaths, by way of short in-breaths, by way of breathing out experiencing the whole body, by way of breathing in experiencing the whole body, by way of breathing out calming the bodily formation, by way of breathing in calming the bodily formation — for one who knows the mind's one-pointedness and non-distraction, rapture and gladness arise. That rapture and gladness which is delight, rejoicing, mirth, merriment, elation of mind, satisfaction of mind — this is rapture. [1]
That rapture comes to be fully recognized: for one who knows the mind's one-pointedness and non-distraction by way of long out-breaths, mindfulness is established; by that mindfulness and by that knowledge (ñāṇa) that rapture comes to be fully recognized. For one who knows the mind's one-pointedness and non-distraction by way of long in-breaths, mindfulness is established; by that mindfulness and by that knowledge that rapture comes to be fully recognized. By way of short out-breaths, by way of short in-breaths, by way of breathing out experiencing the whole body, by way of breathing out calming the bodily formation, by way of breathing in calming the bodily formation — for one who knows the mind's one-pointedness and non-distraction, mindfulness is established; by that mindfulness and by that knowledge that rapture comes to be fully recognized. For one adverting, that rapture comes to be fully recognized; for one knowing … for one seeing, for one reviewing, for one steadying the mind, for one resolving with faith, for one exerting energy (vīriya), for one establishing mindfulness, for one concentrating the mind, for one understanding with wisdom, for one directly knowing what is to be directly known, for one fully understanding what is to be fully understood, for one abandoning what is to be abandoned, for one developing what is to be developed, for one realizing what is to be realized — that rapture comes to be fully recognized. Thus that rapture is experienced.
By way of the out-breaths and in-breaths with experiencing of rapture, feeling (vedanā) is the establishment; mindfulness is the knowledge of contemplation. Feeling is the establishment, not mindfulness; mindfulness is both the establishment and mindfulness itself. By that mindfulness and by that knowledge he contemplates that feeling. Hence it is said: "the development of the establishment of mindfulness (satipaṭṭhāna) consisting in contemplation of feelings in feelings."
"He contemplates": how does he contemplate that feeling? … Thus he contemplates that feeling.
"Development": there are four kinds of development … development in the sense of repeated practice. The out-breaths and in-breaths with experiencing of rapture are purity of virtue (sīlavisuddhi) in the sense of restraint … For one who knows the mind's one-pointedness and non-distraction by way of the out-breaths and in-breaths with experiencing of rapture … knowing, he brings the faculties together; hence it is said: "and he penetrates the meaning of peace."
[Translator's footnote 1: The Ma. and Yu. editions read: "ayaṃ pīti. Kathaṃ sā pīti …" ("this is rapture. How does that rapture …").]
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.