1Jn 1:5-2:2 (King James)

⁵ This then is the message which we have heard of him, and declare unto you, that God is light, and in him is no darkness at all.
⁶ If we say that we have fellowship with him, and walk in darkness, we lie, and do not the truth:
⁷ But if we walk in the light, as he is in the light, we have fellowship one with another, and the blood of Jesus Christ his Son cleanseth us from all sin.
⁸ If we say that we have no sin, we deceive ourselves, and the truth is not in us.
⁹ If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
¹⁰ If we say that we have not sinned, we make him a liar, and his word is not in us.

1 Jean 2

¹ My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
² And he is the propitiation for our sins: and not for our's only, but also for the sins of the whole world.

1Jn 1:5-2:2 (Stephanus 1550)

⁵ καὶ αὕτη ἐστὶν ἡ ἐπαγγελία ἣν ἀκηκόαμεν ἀπ᾽ αὐτοῦ, καὶ ἀναγγέλλομεν ὑμῖν, ὅτι ὁ θεὸς φῶς ἐστιν, καὶ σκοτία ἐν αὐτῷ οὐκ ἔστιν οὐδεμία
⁶ ἐὰν εἴπωμεν ὅτι κοινωνίαν ἔχομεν μετ᾽ αὐτοῦ, καὶ ἐν τῷ σκότει περιπατῶμεν, ψευδόμεθα, καὶ οὐ ποιοῦμεν τὴν ἀλήθειαν
⁷ ἐὰν δὲ ἐν τῷ φωτὶ περιπατῶμεν, ὡς αὐτός ἐστιν ἐν τῷ φωτὶ, κοινωνίαν ἔχομεν μετ᾽ ἀλλήλων, καὶ τὸ αἷμα ἰησοῦ χριστοῦ τοῦ υἱοῦ αὐτοῦ καθαρίζει ἡμᾶς ἀπὸ πάσης ἁμαρτίας
⁸ ἐὰν εἴπωμεν ὅτι ἁμαρτίαν οὐκ ἔχομεν, ἑαυτοὺς πλανῶμεν, καὶ ἡ ἀλήθεια οὐκ ἔστιν ἐν ἡμῖν
⁹ ἐὰν ὁμολογῶμεν τὰς ἁμαρτίας ἡμῶν, πιστός ἐστιν καὶ δίκαιος ἵνα ἀφῇ ἡμῖν τὰς ἁμαρτίας, καὶ καθαρίσῃ ἡμᾶς ἀπὸ πάσης ἀδικίας
¹⁰ ἐὰν εἴπωμεν ὅτι οὐχ ἡμαρτήκαμεν, ψεύστην ποιοῦμεν αὐτὸν, καὶ ὁ λόγος αὐτοῦ οὐκ ἔστιν ἐν ἡμῖν

1 Jean 2

¹ τεκνία μου, ταῦτα γράφω ὑμῖν, ἵνα μὴ ἁμάρτητε καὶ ἐάν τις ἁμάρτῃ, παράκλητον ἔχομεν πρὸς τὸν πατέρα, ἰησοῦν χριστὸν δίκαιον
² καὶ αὐτὸς ἱλασμός ἐστιν περὶ τῶν ἁμαρτιῶν ἡμῶν οὐ περὶ τῶν ἡμετέρων δὲ μόνον, ἀλλὰ καὶ περὶ ὅλου τοῦ κόσμου