1 John 2:1-3

My dear children, I am writing this to you so that you will not sin. But if anyone does sin, we have an advocate who pleads our case before the Father. He is Jesus Christ, the one who is truly righteous. He himself is the sacrifice that atones for our sins—and not only our sins but the sins of all the world. And we can be sure that we know him if we obey his commandments.