“My Father has given me all things. No one knows the Son except the Father, and no one knows the Father except the Son and those to whom the Son chooses to reveal him.
“My Father has given me all things. No one knows who the Son is except the Father, and no one knows who the Father is except the Son and those to whom the Son chooses to reveal him.”
Who, then, is the liar? It is those who say that Jesus is not the Messiah. Such people are the Enemy of Christ—they reject both the Father and the Son.
This is how you will be able to know whether it is God's Spirit: anyone who acknowledges that Jesus Christ came as a human being has the Spirit who comes from God.
We know that the Son of God has come and has given us understanding, so that we know the true God. We live in union with the true God—in union with his Son Jesus Christ. This is the true God, and this is eternal life.