1 John 3:1
1See how great a love the Father has given to us, that we should be called children of God! For this cause the world doesn’t know us, because it didn’t know him.
See how great a love: we should be called—that is, should be—the children of God. Wesley: the world knows not what to make of us; we are a mystery to them.
The love bestowed is adoption, not a name only. So we are. The world’s ignorance of us tracks its ignorance of Him. Shared ground: this love is gift.
Calvin: not common honor when the Father adopted us. Love has been bestowed: from mere bounty. Adoption of all the godly is gratuitous and does not depend on any regard to works. Why are we sons? Because God began to love us freely when we deserved hatred.
The only cause of salvation is adoption, flowing from mere love. The world doesn’t know us because it knew Him not. See how great a love.