Dighanikaya 29.167

29.167

Apicettha ñāyappaṭipannoti kāraṇappaṭipanno. Ñāyamārādhessatīti kāraṇaṃ nipphādessati. Vīriyaṃ ārabhatīti attano dukkhanibbattakaṃ vīriyaṃ karoti. Vuttañhetaṃ ‘‘durakkhāte, bhikkhave, dhammavinaye yo āraddhavīriyo, so dukkhaṃ viharati. Yo kusīto, so sukhaṃ viharatī’’ti (a. ni. 1.318).

Moreover, here, “practicing the method” means practicing the proper way. “Will master the method” means will accomplish the proper way. “Arouses energy” means he exerts energy that generates suffering for himself. For this has been said: “Bhikkhus, in an ill-proclaimed Dhamma and Vinaya, one who has aroused energy lives in suffering. One who is lazy lives in ease.” (A. 1.318).