John 16:7-11

But I tell you the truth, it is better for you that I go away. When I go away, I will send the Helper to you. If I do not go away, the Helper will not come. When the Helper comes, he will prove to the people of the world the truth about sin, about being right with God, and about judgment. He will prove to them that sin is not believing in me. He will prove to them that being right with God comes from my going to the Father and not being seen anymore. And the Helper will prove to them that judgment happened when the ruler of this world was judged.