εἰς δέον

From LSJ

οὕτω τι βαθὺ καὶ μυστηριῶδες ἡ σιγὴ καὶ νηφάλιον, ἡ δὲ μέθη λάλον → silence is something profound and mysterious and sober, but drunkenness chatters

Source

Greek > English (Woodhouse)

early, at the right moment, in the nick of time