And by this we know that we have known him, if we keep his commandments. 4He who saith that he knoweth him and keepeth not his commandments is a liar: and the truth is not in him. 5But 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. 6He that saith he abideth in him ought himself also to walk even as he walked.