[409] The Blessed One said this: "And how, Aggivessana, is one undeveloped in body (abhāvitakāya) and undeveloped in mind (citta)? Here, Aggivessana, a pleasant feeling (vedanā) arises in an unlearned ordinary person. Touched by that pleasant feeling, he becomes one who lusts after pleasure, and he falls into the state of lusting after pleasure. That pleasant feeling of his ceases; with the cessation of the pleasant feeling, a painful feeling arises. Touched by that painful feeling, he sorrows, is wearied, laments, beats his breast and wails, and falls into confusion. In him, Aggivessana, even that arisen pleasant feeling persists occupying the mind, because the body is undeveloped; even the arisen painful feeling persists occupying the mind, because the mind is undeveloped. In whomever, Aggivessana, in this twofold way, even an arisen pleasant feeling persists occupying the mind, because the body is undeveloped, and even an arisen painful feeling persists occupying the mind, because the mind is undeveloped—it is thus, Aggivessana, that one is undeveloped in body and undeveloped in mind.
"And how, Aggivessana, is one developed in body and developed in mind? Here, Aggivessana, a pleasant feeling arises in a learned noble disciple. Touched by that pleasant feeling, he does not become one who lusts after pleasure, and he does not fall into the state of lusting after pleasure. That pleasant feeling of his ceases; with the cessation of the pleasant feeling, a painful feeling arises. Touched by that painful feeling, he does not sorrow, is not wearied, does not lament, does not beat his breast and wail, and does not fall into confusion. In him, Aggivessana, even that arisen pleasant feeling does not persist occupying the mind, because the body is developed; even the arisen painful feeling does not persist occupying the mind, because the mind is developed. In whomever, Aggivessana, in this twofold way, even an arisen pleasant feeling does not persist occupying the mind, because the body is developed, and even an arisen painful feeling does not persist occupying the mind, because the mind is developed—it is thus, Aggivessana, that one is developed in body and developed in mind."
"I have such confidence in the worthy Gotama: for the worthy Gotama is developed in body and developed in mind."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.