1Jn 4:9-21 (King James)

⁹ In this was manifested the love of God toward us, because that God sent his only begotten Son into the world, that we might live through him.
¹⁰ Herein is love, not that we loved God, but that he loved us, and sent his Son to be the propitiation for our sins.
¹¹ Beloved, if God so loved us, we ought also to love one another.
¹² No man hath seen God at any time. If we love one another, God dwelleth in us, and his love is perfected in us.
¹³ Hereby know we that we dwell in him, and he in us, because he hath given us of his Spirit.
¹⁴ And we have seen and do testify that the Father sent the Son to be the Saviour of the world.
¹⁵ Whosoever shall confess that Jesus is the Son of God, God dwelleth in him, and he in God.
¹⁶ And we have known and believed the love that God hath to us. God is love; and he that dwelleth in love dwelleth in God, and God in him.
¹⁷ Herein is our love made perfect, that we may have boldness in the day of judgment: because as he is, so are we in this world.
¹⁸ There is no fear in love; but perfect love casteth out fear: because fear hath torment. He that feareth is not made perfect in love.
¹⁹ We love him, because he first loved us.
²⁰ If a man say, I love God, and hateth his brother, he is a liar: for he that loveth not his brother whom he hath seen, how can he love God whom he hath not seen?
²¹ And this commandment have we from him, That he who loveth God love his brother also.

1Jn 4:9-21 (Stephanus 1550)

⁹ ἐν τούτῳ ἐφανερώθη ἡ ἀγάπη τοῦ θεοῦ ἐν ἡμῖν, ὅτι τὸν υἱὸν αὑτοῦ τὸν μονογενῆ ἀπέσταλκεν ὁ θεὸς εἰς τὸν κόσμον, ἵνα ζήσωμεν δι᾽ αὐτοῦ
¹⁰ ἐν τούτῳ ἐστὶν ἡ ἀγάπη, οὐχ ὅτι ἡμεῖς ἠγαπήσαμεν τὸν θεὸν, ἀλλ᾽ ὅτι αὐτὸς ἠγάπησεν ἡμᾶς, καὶ ἀπέστειλεν τὸν υἱὸν αὑτοῦ ἱλασμὸν περὶ τῶν ἁμαρτιῶν ἡμῶν
¹¹ ἀγαπητοὶ, εἰ οὕτως ὁ θεὸς ἠγάπησεν ἡμᾶς, καὶ ἡμεῖς ὀφείλομεν ἀλλήλους ἀγαπᾶν
¹² θεὸν οὐδεὶς πώποτε τεθέαται ἐὰν ἀγαπῶμεν ἀλλήλους, ὁ θεὸς ἐν ἡμῖν μένει, καὶ ἡ ἀγάπη αὐτοῦ τετελειωμένη ἐστὶν ἐν ἡμῖν
¹³ ἐν τούτῳ γινώσκομεν ὅτι ἐν αὐτῷ μένομεν καὶ αὐτὸς ἐν ἡμῖν, ὅτι ἐκ τοῦ πνεύματος αὑτοῦ δέδωκεν ἡμῖν
¹⁴ καὶ ἡμεῖς τεθεάμεθα, καὶ μαρτυροῦμεν ὅτι ὁ πατὴρ ἀπέσταλκεν τὸν υἱὸν σωτῆρα τοῦ κόσμου
¹⁵ ὃς ἂν ὁμολογήσῃ ὅτι ἰησοῦς ἐστιν ὁ υἱὸς τοῦ θεοῦ, ὁ θεὸς ἐν αὐτῷ μένει, καὶ αὐτὸς ἐν τῷ θεῷ
¹⁶ καὶ ἡμεῖς ἐγνώκαμεν καὶ πεπιστεύκαμεν τὴν ἀγάπην ἣν ἔχει ὁ θεὸς ἐν ἡμῖν ὁ θεὸς ἀγάπη ἐστὶν, καὶ ὁ μένων ἐν τῇ ἀγάπῃ, ἐν τῷ θεῷ μένει, καὶ ὁ θεὸς ἐν αὐτῷ
¹⁷ ἐν τούτῳ τετελείωται ἡ ἀγάπη μεθ᾽ ἡμῶν, ἵνα παῤῥησίαν ἔχωμεν ἐν τῇ ἡμέρᾳ τῆς κρίσεως, ὅτι καθὼς ἐκεῖνός ἐστιν, καὶ ἡμεῖς ἐσμεν ἐν τῷ κόσμῳ τούτῳ
¹⁸ Φόβος 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
¹⁹ ἡμεῖς ἀγαπῶμεν αὐτὸν, ὅτι αὐτὸς πρῶτος ἠγάπησεν ἡμᾶς
²⁰ ἐάν τις εἴπῃ, ὅτι ἀγαπῶ τὸν θεὸν, καὶ τὸν ἀδελφὸν αὑτοῦ μισῇ, ψεύστης ἐστίν ὁ γὰρ μὴ ἀγαπῶν τὸν ἀδελφὸν αὑτοῦ ὃν ἑώρακεν, τὸν θεὸν ὃν οὐχ ἑώρακεν, πῶς δύναται ἀγαπᾶν
²¹ καὶ ταύτην τὴν ἐντολὴν ἔχομεν ἀπ᾽ αὐτοῦ, ἵνα ὁ ἀγαπῶν τὸν θεὸν, ἀγαπᾷ καὶ τὸν ἀδελφὸν αὑτοῦ