[83] Then the Venerable Puṇṇiya approached the Blessed One; having approached, he paid homage to the Blessed One and sat down at one side. Sitting at one side, the Venerable Puṇṇiya said this to the Blessed One: "Venerable sir, what is the cause, what is the condition, why at times the teaching of the Dhamma occurs with inspiration to the Tathāgata, and at times does not occur?"
"Puṇṇiya, a bhikkhu has faith but does not approach: so long the teaching of the Dhamma does not occur with inspiration to the Tathāgata. But when a bhikkhu both has faith and approaches, then the teaching of the Dhamma occurs with inspiration to the Tathāgata. Puṇṇiya, a bhikkhu has faith and approaches, but does not attend upon [the Teacher] … attends, but does not question … questions, but does not listen to the Dhamma with eager ears … listens to the Dhamma with eager ears, but having heard it does not retain the Dhamma … having heard it retains the Dhamma, but does not examine the meaning of the teachings retained … examines the meaning of the teachings retained, but does not, having understood the meaning and understood the Dhamma, practise in accordance with the Dhamma … having understood the meaning and understood the Dhamma, practises in accordance with the Dhamma, but is not of lovely speech, lovely in his manner of speaking, endowed with urbane speech that is distinct, free of stammering, and capable of making the meaning known … is of lovely speech, lovely in his manner of speaking, endowed with urbane speech that is distinct, free of stammering, and capable of making the meaning known, but is not one who instructs, rouses, inspires, and gladdens his fellows in the holy life: so long the teaching of the Dhamma does not occur with inspiration to the Tathāgata.
"But when, Puṇṇiya, a bhikkhu has faith, and approaches, and attends upon [the Teacher], and questions, and listens to the Dhamma with eager ears, and having heard it retains the Dhamma, and examines the meaning of the teachings retained, and having understood the meaning and understood the Dhamma practises in accordance with the Dhamma, and is of lovely speech, lovely in his manner of speaking, endowed with urbane speech that is distinct, free of stammering, and capable of making the meaning known, and is one who instructs, rouses, inspires, and gladdens his fellows in the holy life — then the teaching of the Dhamma occurs with inspiration to the Tathāgata. Puṇṇiya, when endowed with these ten qualities, the teaching of the Dhamma occurs with inspiration to the Tathāgata unreservedly."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.