ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
going back: V. ἄψορρος, παλίσσυτος.
quiet: P. and V. ἥσυχος, ἡσυχαῖος, ἀπράγμων (Eur., Fragment), P. ἡσύχιος; see shy.