Behold, how great a love the Father has bestowed on us, that we should be called children of God! For this cause the world doesn't know us, because it didn't know him.

 (iii) He tells us why sin is. It comes from the failure to abide in Christ. We need not think that this is a truth only for advanced mystics. It simply means this--so long as we remember the continual presence of Jesus, we will not sin; it is when we forget that presence that we sin. 