ὕπνος δεινὸν ἀνθρώποις κακόν → sleep is a terrible evil for humans (Menander, Sententiae monostichoi 1.523)
adj.
P. and V. ἔννους, ἔμφρων, V. φρενήρης, ἀρτίφρων (also Plat. but rare P.).
Of things: P. and V. ἔμφρων; see wise.
Be sane, v.: P. and V. φρονεῖν, εὖ φρονεῖν, ὀρθῶς φρονεῖν, V. καλῶς φρονεῖν, ὀρθὰ φρονεῖν, Ar. and P. ὑγιαίνειν.