[154] [64] Bhikkhus, a bhikkhu endowed with four qualities is capable of benefiting himself, but not others. Which four? Here, bhikkhus, a bhikkhu is quick to grasp wholesome (kusala) dhammas; he is of a nature to retain the dhammas he has heard; he examines the meaning (attha) of the dhammas he has retained; and, having understood the meaning and understood the dhamma, he is one practicing in accordance with the Dhamma (dhammānudhammapaṭipanno). But he is not one of lovely speech (kalyāṇavāca), not one whose utterance is lovely, not endowed with urbane speech that is distinct, flawless, and conveying the meaning; and he is not one who instructs, exhorts, inspires, and gladdens his fellows in the holy life (sabrahmacārī). Endowed with these four qualities, bhikkhus, a bhikkhu is capable of benefiting himself, but not others.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.