[608] "Suppose, brahmin, there were a bowl of water covered over with moss and water-plants. If a man with good eyes were to examine the reflection of his own face in it, he would not know or see it as it really is (yathābhūta). So too, brahmin, on whatever occasion one dwells with a mind (citta) obsessed by dullness and drowsiness (thīna-middha), overwhelmed by dullness and drowsiness, and one does not know or see as it really is the escape (nissaraṇa) from arisen dullness and drowsiness — on that occasion one does not know or see as it really is one's own good; on that occasion one does not know or see as it really is the good of others …; on that occasion one does not know or see as it really is the good of both. Even texts long recited do not recur to the mind, still less those not recited."
English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.