That we should be called — That is, should be, the children of God. Therefore the world knoweth us not — They know not what to make of us. We are a mystery to them.
Related Commentaries of 1 John 3:1
1 John 3:1
1 Behold, what manner of love the Father hath bestowed upon us, that we should be called the sons of God: therefore the world knoweth us not, because it knew him not.