Therefore if I know not the meaning of the voice, I shall be unto him that speaketh a barbarian, and he that speaketh shall be a barbarian unto me.
If then I do not grasp the meaning of what someone is saying, I am a foreigner to the speaker, and the speaker is a foreigner to me.
Ἐὰν οὖν μὴ εἰδῶ τὴν δύναμιν τῆς φωνῆς, ἔσομαι τῷ λαλοῦντι βάρβαρος, καὶ ὁ λαλῶν ἐν ἐμοὶ βάρβαρος.
Ean oyn mē eidō tēn dynamin tēs phōnēs, esomai tō laloynti barbaros, kai o lalōn en emoi barbaros.