John 16:5-11 NIV
but now I am going to him who sent me. None of you asks me, ‘Where are you going?’ Rather, you are filled with grief because I have said these things. But very truly I tell you, it is for your good that I am going away. Unless I go away, the Advocate will not come to you; but if I go, I will send him to you. When he comes, he will prove the world to be in the wrong about sin and righteousness and judgment: about sin, because people do not believe in me; about righteousness, because I am going to the Father, where you can see me no longer; and about judgment, because the prince of this world now stands condemned.
NIV: New International Version