1 John 2:3–11

³And hereby we know that we know him, if we keep his commandments. ⁴He that saith, I know him, and keepeth not his commandments, is a liar, and the truth is not in him; ⁵but whoso keepeth his word, in him verily hath the love of God been perfected. Hereby we know that we are in him: ⁶he that saith he abideth in him ought himself also to walk even as he walked.

⁷Beloved, no new commandment write I unto you, but an old commandment which ye had from the beginning: the old commandment is the word which ye heard. ⁸Again, a new commandment write I unto you, which thing is true in him and in you; because the darkness is passing away, and the true light already shineth. ⁹He that saith he is in the light and hateth his brother, is in the darkness even until now. ¹⁰He that loveth his brother abideth in the light, and there is no occasion of stumbling in him. ¹¹But he that hateth his brother is in the darkness, and walketh in the darkness, and knoweth not whither he goeth, because the darkness hath blinded his eyes.