Beloved, now we are children of God, and it is not yet revealed what we will be. But we know that, when he is revealed, we will be like him; for we will see him just as he is.

 (ii) He tells us what sin does. It undoes the work of Christ. Christ is the Lamb of God who takes away the sins of the world ( John 1:29). To sin is to bring back what he came into the world to abolish. 