ἄγνοια τοῦ συνισταμένου καὶ φυομένου κακοῦ
From LSJ
τῶν ἁλῶν συγκατεδηδοκέναι μέδιμνον → have eaten a bushel of salt together
English > Greek (Woodhouse Quotes Reversed)
ignorance of the trouble brewing and gathering to a head, ignorance of the trouble gathering and coming to a head