1Jn 2:3-11 (King James)

   ³ And hereby we do know that we know him, if we keep his commandments. ⁴ He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him. ⁵ But whoso keepeth his word, in him verily is the love of God perfected: hereby know we that we are in him. ⁶ He that saith he abideth in him ought himself also so to walk, even as he walked.
   ⁷ Brethren, I write no new commandment unto you, but an old commandment which ye had from the beginning. The old commandment is the word which ye have heard from the beginning. ⁸ Again, a new commandment I write unto you, which thing is true in him and in you: because the darkness is past, and the true light now shineth. ⁹ He that saith he is in the light, and hateth his brother, is in darkness even until now. ¹⁰ He that loveth his brother abideth in the light, and there is none occasion of stumbling in him. ¹¹ But he that hateth his brother is in darkness, and walketh in darkness, and knoweth not whither he goeth, because that darkness hath blinded his eyes.

1Jn 2:3-11 (Stephanus 1550)

³ καὶ ἐν τούτῳ γινώσκομεν ὅτι ἐγνώκαμεν αὐτὸν, ἐὰν τὰς ἐντολὰς αὐτοῦ τηρῶμεν ⁴ ὁ λέγων, ἔγνωκα αὐτὸν, καὶ τὰς ἐντολὰς αὐτοῦ μὴ τηρῶν, ψεύστης ἐστὶν, καὶ ἐν τούτῳ ἡ ἀλήθεια οὐκ ἔστιν ⁵ ὃς δ᾽ ἂν τηρῇ αὐτοῦ τὸν λόγον, ἀληθῶς ἐν τούτῳ ἡ ἀγάπη τοῦ θεοῦ τετελείωται ἐν τούτῳ γινώσκομεν ὅτι ἐν αὐτῷ ἐσμεν ⁶ ὁ λέγων ἐν αὐτῷ μένειν, ὀφείλει, καθὼς ἐκεῖνος περιεπάτησεν, καὶ αὐτὸς οὕτως περιπατεῖν ⁷ ἀδελφοὶ, οὐκ ἐντολὴν καινὴν γράφω ὑμῖν, ἀλλ᾽ ἐντολὴν παλαιὰν, ἣν εἴχετε ἀπ᾽ ἀρχῆς ἡ ἐντολὴ ἡ παλαιά ἐστιν ὁ λόγος ὃν ἠκούσατε ἀπ᾽ ἀρχῆς ⁸ πάλιν ἐντολὴν καινὴν γράφω ὑμῖν, ὅ ἐστιν ἀληθὲς ἐν αὐτῷ, καὶ ἐν ὑμῖν, ὅτι ἡ σκοτία παράγεται, καὶ τὸ φῶς τὸ ἀληθινὸν ἤδη φαίνει ⁹ ὁ λέγων ἐν τῷ φωτὶ εἶναι, καὶ τὸν ἀδελφὸν αὑτοῦ μισῶν, ἐν τῇ σκοτίᾳ ἐστὶν ἕως ἄρτι ¹⁰ ὁ ἀγαπῶν τὸν ἀδελφὸν αὑτοῦ, ἐν τῷ φωτὶ μένει, καὶ σκάνδαλον ἐν αὐτῷ οὐκ ἔστιν ¹¹ ὁ δὲ μισῶν τὸν ἀδελφὸν αὑτοῦ, ἐν τῇ σκοτίᾳ ἐστὶν, καὶ ἐν τῇ σκοτίᾳ περιπατεῖ, καὶ οὐκ οἶδεν ποῦ ὑπάγει, ὅτι ἡ σκοτία ἐτύφλωσεν τοὺς ὀφθαλμοὺς αὐτοῦ