Thematic Bible: Who the love of God is perfected in

Dear children, I write thus to you in order that you may not sin. If any one sins, we have an Advocate with the Father--Jesus Christ the righteous; and He is an atoning sacrifice for our sins, and not for ours only, but also for the sins of the whole world. And by this we may know that we know Him--if we obey His commands. read more.
He who professes to know Him, and yet does not obey His commands, is a liar, and the truth has no place in his heart. But whoever obeys His Message, in him love for God has in very deed reached perfection. By this we can know that we are in Him.