Thematic Bible: What preachers should do

My little children, these things I write to you, that you may not sin. Yet if any one has sinned, we have an advocate with the Father, Jesus Christ the Just One. And he is a propitiation for our sins; and not for ours only, but also for the whole world. And by this, we know that we have known him, if we keep his commandments. read more.
He who says, I have known him, and does not keep his commandments, is a liar, and the truth is not in this man. But whoever keeps his word, truly in this man the love of God is perfected. By this we know that we are in him. He who says he abides in him, ought, himself, also, so to walk even as he walked.