[541] How does one develop serenity (samatha) and insight (vipassanā) yoked as a pair (yuganaddha) in the sense of being without taints (āsava)?
For one abandoning restlessness (uddhacca), concentration (samādhi) — the one-pointedness and non-distraction of the mind (citta) — is without taint by the taint of sensuality (kāmāsava); it has cessation (nirodha) as its domain. For one abandoning ignorance (avijjā), insight, in the sense of contemplating, is without taint by the taint of ignorance (avijjāsava); it has cessation as its domain. Thus, in the sense of being without taints, serenity and insight are of a single function (ekarasa); they are yoked as a pair; they do not exceed one another. Therefore it is said: one develops serenity and insight yoked as a pair in the sense of being without taints.
How does one develop serenity and insight yoked as a pair in the sense of crossing over (taraṇa)?
For one crossing over the defilements accompanied by restlessness and the aggregates (khandha), concentration — the one-pointedness and non-distraction of the mind — has cessation as its domain. For one crossing over the defilements accompanied by ignorance and the aggregates, insight, in the sense of contemplating, has cessation as its domain. Thus, in the sense of crossing over, serenity and insight are of a single function; they are yoked as a pair; they do not exceed one another. Therefore it is said: one develops serenity and insight yoked as a pair in the sense of crossing over.
How does one develop serenity and insight yoked as a pair in the sense of the signless (animitta)?
For one abandoning restlessness, concentration — the one-pointedness and non-distraction of the mind — is signless with regard to all signs (nimitta); it has cessation as its domain. For one abandoning ignorance, insight, in the sense of contemplating, is signless with regard to all signs; it has cessation as its domain. Thus, in the sense of the signless, serenity and insight are of a single function; they are yoked as a pair; they do not exceed one another. Therefore it is said: one develops serenity and insight yoked as a pair in the sense of the signless.
How does one develop serenity and insight yoked as a pair in the sense of the undirected (appaṇihita)?
For one abandoning restlessness, concentration — the one-pointedness and non-distraction of the mind — is undirected with regard to all directings (paṇidhi); it has cessation as its domain. For one abandoning ignorance, insight, in the sense of contemplating, is undirected with regard to all directings; it has cessation as its domain. Thus, in the sense of the undirected, serenity and insight are of a single function; they are yoked as a pair; they do not exceed one another. Therefore it is said: one develops serenity and insight yoked as a pair in the sense of the undirected.
How does one develop serenity and insight yoked as a pair in the sense of emptiness (suññatā)?
For one abandoning restlessness, concentration — the one-pointedness and non-distraction of the mind — is empty of all adherences (abhinivesa); it has cessation as its domain. For one abandoning ignorance, insight, in the sense of contemplating, is empty of all adherences; it has cessation as its domain. Thus, in the sense of emptiness, serenity and insight are of a single function; they are yoked as a pair; they do not exceed one another. Therefore it is said: one develops serenity and insight yoked as a pair in the sense of emptiness.
"Develops": there are four kinds of development (bhāvanā): development in the sense that the dhammas arisen therein do not exceed one another; development in the sense that the faculties (indriya) have a single function; development in the sense of carrying forward the energy appropriate thereto; development in the sense of repeated practice (āsevana) … "The path (magga) is generated": how is the path generated? … Thus the path is generated … Thus the fetters (saṃyojana) are abandoned, the underlying tendencies (anusaya) are eliminated. Thus one develops serenity and insight yoked as a pair in the sense of emptiness. In these sixteen ways one develops serenity and insight yoked as a pair. Thus one develops serenity and insight yoked as a pair.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.