All things have been handed over to me by my Father. No one knows who the Son is except the Father, and who the Father is except the Son and anyone to whom the Son wishes to reveal him.” The Privileges of Discipleship.
See what love the Father has bestowed on us that we may be called the children of God. Yet so we are. The reason the world does not know us is that it did not know him.
We also know that the Son of God has come and has given us discernment to know the one who is true. And we are in the one who is true, in his Son Jesus Christ. He is the true God and eternal life.