Evameva kho, brāhmaṇa, yasmiṁ samaye thinamiddhapariyuṭṭhitena cetasā viharati thinamiddhaparetena, uppannassa ca thinamiddhassa nissaraṇaṁ yathābhūtaṁ nappajānāti, attatthampi tasmiṁ samaye yathābhūtaṁ na jānāti na passati, paratthampi …pe… ubhayatthampi tasmiṁ samaye yathābhūtaṁ na jānāti na passati; dīgharattaṁ sajjhāyakatāpi mantā nappaṭibhanti, pageva asajjhāyakatā.
In the same way, when your heart is overcome and mired in dullness and drowsiness … Even hymns that are long-rehearsed don’t spring to mind, let alone those that are not rehearsed.