3 And by this we know that we have known him, if we keep his commandments.
4 He who saith that he knoweth him, and keepeth not his commandments, is a liar, and the truth is not in him.
5 But he that keepeth his word, in him in very deed the charity of God is perfected; and by this we know that we are in him.
6 He that saith he abideth in him, ought himself also to walk, even as he walked.
7 Dearly beloved, I write not a new commandment to you, but an old commandment which you had from the beginning. The old commandment is the word which you have heard.
8 Again a new commandment I write unto you, which thing is true both in him and in you; because the darkness is passed, 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.