[53] Bhikkhus, there are these five factors of striving (padhāniyaṅga). What five? Here, bhikkhus, a bhikkhu has faith (saddhā); he places faith in the awakening (bodhi) of the Tathāgata thus: "Thus indeed is that Blessed One: accomplished (arahaṃ), fully self-enlightened, perfect in true knowledge and conduct, well-gone, knower of the world, unsurpassed trainer of persons to be tamed, teacher of devas and humans, enlightened, blessed."
He is free from illness and free from affliction, endowed with an even digestion (gahaṇī), neither too cool nor too hot, but medium, capable of enduring striving.
He is not deceitful, not fraudulent, one who reveals himself as he really is (yathābhūta) to the Teacher or to his wise companions in the holy life.
He dwells with energy (vīriya) aroused for the abandoning of unwholesome dhammas and for the acquisition of wholesome dhammas; he is strong, firm in exertion, not shirking the burden with regard to wholesome dhammas.
He is wise, endowed with wisdom that discerns arising and passing away, wisdom that is noble and penetrative, leading to the complete destruction of suffering (dukkha).
These, bhikkhus, are the five factors of striving.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.