[166] "And how, bhikkhus, does a bhikkhu who has a good friend (kalyāṇamitta) develop the Noble Eightfold Path (ariya aṭṭhaṅgika magga), how does he cultivate the Noble Eightfold Path? Here, bhikkhus, a bhikkhu develops right view (sammādiṭṭhi) based upon seclusion (viveka) … he develops right concentration (sammāsamādhi) based upon seclusion, based upon dispassion (virāga), based upon cessation, maturing in relinquishment (vossagga). It is in this way, bhikkhus, that a bhikkhu who has a good friend develops the Noble Eightfold Path and cultivates the Noble Eightfold Path."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.