19. οἴδαμεν ὅτι ἐκ τοῦ Θεοῦ ἐσμεν, καὶ ὁ κόσμος ὅλος ἐν τῷ πονηρῷ κεῖται.
20. οἴδαμεν δὲ ὅτι ὁ υἱὸς τοῦ Θεοῦ ἥκει, καὶ δέδωκεν ἡμῖν διάνοιαν ἵνα γινώσκωμεν τὸν ἀληθινόν· καὶ ἐσμὲν ἐν τῷ ἀληθινῷ, ἐν τῷ υἱῷ αὐτοῦ Ἰησοῦ Χριστῷ. οὗτός ἐστιν ὁ ἀληθινὸς Θεὸς, καὶ ἥ ζωὴ αἰώνιος.
21. Τεκνία, φυλάξατε ἑαυτοὺς ἀπὸ τῶν εἰδώλων. ἀμήν.