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.
That we are the children of God is the wonder of it all. Who are we that we should be named as God’s children with all the benefits such a relationship provides? Like John, we should live in constant awe of this grand privilege. The American Standard Version adds, "and such we are," further announcing the excitement that is felt when we realize that we are the children of the One Who dipped His hand in chaos and sprinkled a universe with worlds. We really are the children of God!