κεκρυμμένην, here=“αἰνιγματώδη”, covert in meaning, though spoken aloud,—because she merely alludes to her vision, without describing it, and without naming the persons to whom she refers (644—654). So Theogn. 681 “ταῦτά μοι ᾐνίχθω κεκρυμμένα τοῖς ἀγαθοῖσιν”. The ancients associated evil with any prayer which could not be freely uttered. The maxim “μετὰ φωνῆς εὔχεσθαι” was ascribed to Pythagoras (Clemens Strom. 4. 26§ 173). Cp. O.C. 131 n. ‘Not every one is ready,’ says Persius (2. 6), “murmurque humilesque susurros | Tollere de templis et aperto vivere voto.” Cp. Horace Epp. 1. 16. 59.
οὐ γὰρ ἐν φίλοις, meaning Electra: for the plur., cp. 652.
