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 (Vulgate)

   ³ Et in hoc scimus quoniam cognovimus eum, si mandata ejus observemus.
   ⁴ Qui dicit se nosse eum, et mandata ejus non custodit, mendax est, et in hoc veritas non est.
   ⁵ Qui autem servat verbum ejus, vere in hoc caritas Dei perfecta est : et in hoc scimus quoniam in ipso sumus.
   ⁶ Qui dicit se in ipso manere, debet, sicut ille ambulavit, et ipse ambulare.
   ⁷ Carissimi, non mandatum novum scribo vobis, sed mandatum vetus, quod habuistis ab initio. Mandatum vetus est verbum, quod audistis.
   ⁸ Iterum mandatum novum scribo vobis, quod verum est et in ipso, et in vobis : quia tenebræ transierunt, et verum lumen jam lucet.
   ⁹ Qui dicit se in luce esse, et fratrem suum odit, in tenebris est usque adhuc.
   ¹⁰ Qui diligit fratrem suum, in lumine manet, et scandalum in eo non est.
   ¹¹ Qui autem odit fratrem suum, in tenebris est, et in tenebris ambulat, et nescit quo eat : quia tenebræ obcæcaverunt oculos ejus.