Revised Common Lectionary (Complementary)

³ And hereby are we sure that we know him: if we keep his commandments. ⁴ He who says, I know him, and does not keep his commandments, is a liar, and the truth is not in him. ⁵ Whoever keeps his word, in him is the love of God perfected in deed. And thereby we know that we are in him. ⁶ He who says he abides in him ought to walk even as he walked.

⁷ Brethren, I write no new commandment to you, but that old commandment that you heard from the beginning. The old commandment is the word that you heard from the beginning. ⁸ Again, a new commandment I write to you, a thing that is true in him and also in you. For the darkness is past and the true light now shines. ⁹ He who says that he is in the light and yet hates his brother, is in darkness even until this time. ¹⁰ He who loves his brother abides in the light, and there is no occasion of evil in him. ¹¹ He who hates his brother is in darkness, and walks in darkness, and does not know where he goes because the darkness has blinded his eyes.