2. ἐν τούτῳ γινώσκομεν ὅτι ἀγαπῶμεν τὰ τέκνα τοῦ Θεοῦ, ὅταν τὸν Θεὸν ἀγαπῶμεν, καὶ τὰς ἐντολὰς αὐτοῦ τηρῶμεν·
3. αὕτη γάρ ἐστιν ἡ ἀγάπη τοῦ Θεοῦ, ἵνα τὰς ἐντολὰς αὐτοῦ τηρῶμεν· καὶ αἱ ἐντολαὶ αὐτοῦ βαρεῖαι οὐκ εἰσίν.
4. ὅτι πᾶν τὸ γεγεννημένον ἐκ τοῦ Θεοῦ νικᾷ τὸν κόσμον· καὶ αὕτη ἐστὶν ἡ νίκη ἡ νικήσασα τὸν κόσμον, ἡ πίστις ἡμῶν.
5. τίς ἐστιν ὁ νικῶν τὸν κόσμον, εἰ μὴ ὁ πιστεύων ὅτι Ἰησοῦς ἐστιν ὁ υἱὸς τοῦ Θεοῦ;
6. οὗτός ἐστιν ὁ ἐλθὼν δι’ ὕδατος καὶ αἵματος, Ἰησοῦς ὁ 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 εν τῷ οὐρανῷ, ὁ πατήρ, ὁ λόγος, καὶ τὸ Ἅγιον Πνεῦμα· καὶ οὗτοι οἱ τρεῖς ἕν εἰσι.
8. καὶ τρεῖς εἰσὶν οἱ μαρτυροῦντες ἐν τῇ γῇ, 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, ἥν μεμαρτύρηκε περὶ τοῦ υἱοῦ αὐτοῦ.
10. ὁ πιστεύων εἰς τὸν υἱὸν τοῦ Θεοῦ ἔχει τὴν μαρτυρίαν ἐν ἑαυτῷ· 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.
12. ὁ ἔχων τὸν υἱὸν, ἔχει τὴν ζωήν· ὁ μὴ ἔχων τὸν υἱὸν τοῦ Θεοῦ τὴν ζωὴν οὐκ ἔχει.
13. Ταῦτα ἔγραψα ὑμῖν, τοῖς πιστεύουσιν εἰς τὸ ὄνομα τοῦ ὑιοῦ τοῦ Θεοῦ, ἵνα εἰδῆτε ὅτι ζωὴν ἔχετε αἰώνιον, καὶ ἵνα πιστεύητε εἰς τὸ ὄνομα τοῦ υἱοῦ τοῦ Θεοῦ.
14. καὶ αὕτη ἐστὶν ἡ παρρησία ἣν ἔχομεν πρὸς αὐτόν, ὅτι ἐάν τι αἰτώμεθα κατὰ τὸ θέλημα αὐτοῦ, ἀκούει ἡμῶν·