1Ἀγαπητοί, μὴ παντὶ πνεύματι πιστεύετε, ἀλλὰ δοκιμάζετε τὰ πνεύματα, εἰ ἐκ τοῦ Θεοῦ ἐστίν· ὅτι πολλοὶ ψευδοπροφῆται ἐξεληλύθασιν εἰς τὸν κόσμον. 2Ἐν τούτῳ γινώσκετε τὸ πνεῦμα τοῦ Θεοῦ. πᾶν πνεῦμα ὃ ὁμολογεῖ Ἰησοῦν Χριστὸν ἐν σαρκὶ ἐληλυθότα, ἐκ τοῦ Θεοῦ ἐστί. 3Καὶ πᾶν πνεῦμα ὃ μὴ ὁμολογεῖ τὸν Ἰησοῦν Χριστὸν ἐν σαρκὶ ἐληλυθότα, ἐκ τοῦ Θεοῦ οὐκ εστι· καὶ τοῦτό ἐστι τὸ τοῦ ἀντιχρίστου, ὃ ἀκηκόατε ὅτι ἔρχεται, καὶ νῦν ἐν τῷ κόσμῳ ἐστὶν ἤδη. 4Ὑμεῖς ἐκ τοῦ Θεοῦ ἐστέ, τεκνία, καὶ νενικήκατε αὐτούς· ὅτι μείζων ἐστὶν ὁ ἐν ὑμῖν ἢ ὁ ἐν τῷ κόσμῳ. 5Αὐτοὶ ἐκ τοῦ κόσμου εἰσί, διὰ τοῦτο ἐκ τοῦ κόσμου λαλοῦσι, καὶ ὁ κόσμος αὐτῶν ἀκούει. 6Ἡμεῖς ἐκ τοῦ Θεοῦ ἐσμέν· ὁ γινώσκων τὸν Θεὸν, ἀκούει ἡμῶν· ὃς οὐκ ἔστιν ἐκ τοῦ Θεοῦ, οὐκ ἀκούει ἡμῶν· ἐκ τούτου γινώσκομεν τὸ πνεῦμα τῆς ἀληθείας καὶ τὸ πνεῦμα τῆς πλάνης.

7Ἀγαπητοί, ἀγαπῶμεν ἀλλήλους, ὅτι ἡ ἀγάπη ἐκ τοῦ Θεοῦ ἐστί, καὶ πᾶς ὁ ἀγαπῶν, ἐκ τοῦ Θεοῦ γεγέννηται, καὶ γινώσκει τὸν θεόν. 8Ὁ μὴ ἀγαπῶν, οὐκ ἔγνω τὸν θεόν· ὅτι ὁ Θεὸς ἀγάπη ἐστίν. 9Ἐν τούτῳ ἐφανερώθη ἡ ἀγάπη τοῦ θεοῦ ἐν ἡμῖν, ὅτι τὸν υἱὸν αὐτοῦ τὸν μονογενῆ ἀπέσταλκεν ὁ θεὸς εἰς τὸν κόσμον, ἵνα ζήσωμεν δι᾽ αὐτοῦ. 10Ἐν τούτῳ ἐστὶν ἡ ἀγάπη, οὐχ ὅτι ημεῖς ἠγαπήσαμεν τὸν θεόν, ἀλλ᾽ ὅτι αὐτὸς ἠγάπησεν ἡμᾶς, καὶ ἀπέστειλε τὸν υἱὸν αὐτοῦ ἱλασμὸν περὶ τῶν ἁμαρτιῶν ἡμῶν. 11Ἀγαπητοί, εἰ οὕτως ὁ θεὸς ἠγάπησεν ἡμᾶς, καὶ ἡμεῖς ὀφείλομεν ἀλλήλους ἀγαπᾷν. 12θεὸν οὐδεὶς πώποτε τεθέαται. ἐὰν ἀγαπῶμεν ἀλλήλους, ὁ θεὸς ἐν ἡμῖν μένει, καὶ ἡ ἀγάπη αὐτοῦ τετελειωμένη ἐστίν ἐν ἡμῖν. 13Ἐν τούτῳ γινώσκομεν ὅτι ἐν αὐτῷ μένομεν, καὶ αὐτὸς ἐν ἡμῖν, ὅτι ἐκ τοῦ πνεύματος αὐτοῦ δέδωκεν ἡμῖν. 14Καὶ ἡμεῖς τεθεάμεθα καὶ μαρτυροῦμεν ὅτι ὁ πατὴρ ἀπέσταλκε τὸν υἱὸν σωτῆρα τοῦ κόσμου.

15Ὃς ἂν ὁμολογήσῃ ὅτι Ἰησοῦς ἐστιν ὁ υἱὸς τοῦ Θεοῦ, ὁ Θεὸς ἐν αὐτῷ μένει, καὶ αὐτὸς ἐν τῷ Θεῷ. 16Καὶ ἡμεῖς ἐγνώκαμεν καὶ πεπιστεύκαμε τὴν ἀγάπην ἣν ἔχει ὁ Θεὸς ἐν ἡμῖν. ὁ Θεὸς ἀγάπη ἐστί, καὶ ὁ μένων ἐν τῇ ἀγάπῃ, ἐν τῷ Θεῷ μένει, καὶ ὁ Θεὸς ἐν αὐτῷ. 17Ἐν τούτῳ τετελείωται ἡ ἀγάπη μεθ᾽ ἡμῶν, ἵνα παῤῥησίαν ἔχωμεν ἐν τῇ ἡμέρᾳ τῆς κρίσεως, ὅτι καθὼς ἐκεῖνος ἐστὶ, καὶ ἡμεῖς ἐσμὲν ἐν τῷ κόσμῳ τούτῳ. 18Φόβος οὐκ ἔστιν ἐν τῇ ἀγάπῃ, ἀλλ᾽ ἡ τελεία ἀγάπη ἔξω βάλλει τὸν φόβον· ὅτι ὁ φόβος κόλασιν ἔχει, ὁ δὲ φοβούμενος οὐ τετελείωται ἐν τῇ ἀγάπῃ. 19Ἡμεῖς ἀγαπῶμεν αὐτὸν, ὅτι αὐτὸς πρῶτος ἠγάπησεν ἡμᾶς. 20ἐάν τις εἴπῃ, Ὅτι ἀγαπῶ τὸν Θεόν, καὶ τὸν ἀδελφὸν αὐτοῦ μισῇ, ψεύστης ἐστίν. ὁ γὰρ μὴ ἀγαπῶν τὸν ἀδελφὸν αὐτοῦ ὃν ἑώρακεν, τὸν Θεὸν ὃν οὐχ ἑώρακε, πῶς δύναται ἀγαπᾷν; 21Καὶ ταύτην τὴν ἐντολὴν ἔχομεν ἀπ᾽ αὐτοῦ, ἵνα ὁ ἀγαπῶν τὸν Θεὸν, ἀγαπᾷ καὶ τὸν ἀδελφὸν αὐτοῦ.