5 τίς ἐστιν ὁ νικῶν τὸν κόσμον εἰ μὴ ὁ πιστεύων ὅτι ᾿Ιησοῦς ἐστιν ὁ υἱὸς τοῦ Θεοῦ;
6 Οὗτός ἐστιν ὁ ἐλθὼν δι᾿ ὕδατος καὶ αἵματος, ᾿Ιησοῦς Χριστός· οὐκ ἐν τῷ ὕδατι μόνον, ἀλλ᾿ ἐν τῷ ὕδατι καὶ τῷ αἵματι· καὶ τὸ Πνεῦμά ἐστι τὸ μαρτυροῦν, ὅτι τὸ Πνεῦμά ἐστιν ἡ ἀλήθεια.
7 ὅτι τρεῖς εἰσιν οἱ μαρτυροῦντες ἐν τῷ οὐρανῷ, ὁ Πατήρ, ὁ Λόγος καὶ τὸ ῞Αγιον Πνεῦμα, καὶ οὗτοι οἱ τρεῖς ἕν εἰσι· καὶ τρεῖς εἰσιν οἱ μαρτυροῦντες ἐν τῇ γῇ,
8 τὸ Πνεῦμα καὶ τὸ ὕδωρ καὶ τὸ αἷμα, καὶ οἱ τρεῖς εἰς τὸ ἕν εἰσιν.
9 εἰ τὴν μαρτυρίαν τῶν ἀνθρώπων λαμβάνομεν, ἡ μαρτυρία τοῦ Θεοῦ μείζων ἐστίν· ὅτι αὕτη ἐστὶν ἡ μαρτυρία τοῦ Θεοῦ ἣν μεμαρτύρηκε περὶ τοῦ υἱοῦ αὐτοῦ.
10 ὁ πιστεύων εἰς τὸν υἱὸν τοῦ Θεοῦ ἔχει τὴν μαρτυρίαν ἐν αὐτῷ· ὁ μὴ πιστεύων τῷ Θεῷ ψεύστην πεποίηκεν αὐτόν, ὅτι οὐ πεπίστευκεν εἰς τὴν μαρτυρίαν ἣν μεμαρτύρηκεν ὁ Θεὸς περὶ τοῦ υἱοῦ αὐτοῦ.
11 καὶ αὕτη ἐστὶν ἡ μαρτυρία, ὅτι ζωὴν αἰώνιον ἔδωκεν ἡμῖν ὁ Θεός, καὶ αὕτη ἡ ζωὴ ἐν τῷ υἱῷ αὐτοῦ ἐστιν.