1 John 3:2-6

My dear friends, we are now God's children, but it is not yet clear what we shall become. But we know that when Christ appears, we shall be like him, because we shall see him as he really is. Everyone who has this hope in Christ keeps himself pure, just as Christ is pure. Whoever sins is guilty of breaking God's law, because sin is a breaking of the law. You know that Christ appeared in order to take away sins, and that there is no sin in him. So everyone who lives in union with Christ does not continue to sin; but whoever continues to sin has never seen him or known him.