The Father (God) has loved us so much! This shows how much he loved us: We are called children of God. And we really are God's children. But the people in the world (people who don't believe) don't understand that we are God's children, because they have not known him (God).
Dear friends, now we are children of God. We have not yet been shown what we will be in the future. But we know that when Christ comes again, we will be like him. We will see him like he really is.