[647] And how, friends, is the mind (citta) said to be not stuck internally (asaṇṭhita)? Here, friends, a bhikkhu, quite secluded from sensual pleasures … enters upon and dwells in the first absorption (jhāna). His consciousness (viññāṇa) does not follow after the rapture (pīti) and pleasure born of seclusion; it is not bound by gratification (assāda) in the rapture and pleasure born of seclusion, not shackled by gratification in the rapture and pleasure born of seclusion, not yoked by the fetter of gratification in the rapture and pleasure born of seclusion: thus the mind is said to be not stuck internally.
Again, friends, further, with the subsiding of thought and examination … a bhikkhu enters upon and dwells in the second absorption. His consciousness does not follow after the rapture and pleasure born of concentration (samādhi); it is not bound by gratification in the rapture and pleasure born of concentration, not shackled by gratification in the rapture and pleasure born of concentration, not yoked by the fetter of gratification in the rapture and pleasure born of concentration: thus the mind is said to be not stuck internally.
Again, friends, further, with the fading away of rapture … a bhikkhu enters upon and dwells in the third absorption. His consciousness does not follow after that equanimity; it is not bound by gratification in the pleasure accompanied by equanimity, not shackled by gratification in the pleasure accompanied by equanimity, not yoked by the fetter of gratification in the pleasure accompanied by equanimity: thus the mind is said to be not stuck internally.
Again, friends, further, with the abandoning of pleasure … a bhikkhu enters upon and dwells in the fourth absorption. His consciousness does not follow after the neither-pain-nor-pleasure; it is not bound by gratification in the neither-pain-nor-pleasure, not shackled by gratification in the neither-pain-nor-pleasure, not yoked by the fetter of gratification in the neither-pain-nor-pleasure: thus the mind is said to be not stuck internally. Thus indeed, friends, the mind is said to be not stuck internally.
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.