Skillful (2nd)Dutiyakusalasutta

“Mendicants, whatever qualities are skillful, part of the skillful, on the side of the skillful, all of them are rooted in rational application of mind and meet at rational application of mind, and rational application of mind is said to be the best of them.“Ye keci, bhikkhave, dhammā kusalā kusalabhāgiyā kusalapakkhikā, sabbe te yonisomanasikāramūlakā yonisomanasikārasamosaraṇā; yonisomanasikāro tesaṁ dhammānaṁ aggamakkhāyati. A mendicant accomplished in rational application of mind can expect to develop and cultivate the seven awakening factors.Yonisomanasikārasampannassetaṁ, bhikkhave, bhikkhuno pāṭikaṅkhaṁ—satta bojjhaṅge bhāvessati, satta bojjhaṅge bahulīkarissati.

And how does a mendicant with rational application of mind develop and cultivate the seven awakening factors?Kathañca, bhikkhave, bhikkhu yonisomanasikārasampanno satta bojjhaṅge bhāveti, satta bojjhaṅge bahulīkaroti? It’s when a mendicant develops the awakening factors of mindfulness, investigation of principles, energy, rapture, tranquility, immersion,Idha, bhikkhave, bhikkhu satisambojjhaṅgaṁ bhāveti vivekanissitaṁ …pe… and equanimity, which rely on seclusion, fading away, and cessation, and ripen as letting go.upekkhāsambojjhaṅgaṁ bhāveti vivekanissitaṁ virāganissitaṁ nirodhanissitaṁ vossaggapariṇāmiṁ. That’s how a mendicant with rational application of mind develops and cultivates the seven awakening factors.”Evaṁ kho, bhikkhave, bhikkhu yonisomanasikārasampanno satta bojjhaṅge bhāveti, satta bojjhaṅge bahulīkarotī”ti.