[258] Bhikkhus, there are these two powers (bala). What two? The power of reflection (paṭisaṅkhānabala) and the power of development (bhāvanābala).
And what, bhikkhus, is the power of reflection? Here, bhikkhus, someone reflects thus: 'Misconduct by body (kāyaduccarita) has an evil result both in this very life and in the life to come; misconduct by speech (vacīduccarita) has an evil result both in this very life and in the life to come; misconduct by mind (manoduccarita) has an evil result both in this very life and in the life to come.' Having reflected thus, he abandons misconduct by body and develops good conduct by body; he abandons misconduct by speech and develops good conduct by speech; he abandons misconduct by mind and develops good conduct by mind; he maintains himself in purity. This, bhikkhus, is called the power of reflection.
And what, bhikkhus, is the power of development? Here, bhikkhus, a bhikkhu develops the mindfulness factor of awakening (satisambojjhaṅga), dependent on seclusion, dependent on dispassion, dependent on cessation, maturing in relinquishment; he develops the investigation-of-dhammas factor of awakening ... he develops the energy factor of awakening ... he develops the rapture factor of awakening ... he develops the tranquility factor of awakening ... he develops the concentration (samādhi) factor of awakening ... he develops the equanimity factor of awakening, dependent on seclusion, dependent on dispassion, dependent on cessation, maturing in relinquishment. This, bhikkhus, is called the power of development.
These, bhikkhus, are the two powers.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.