John 16:7, 13
Chapter 16
7
Believe me, it is better for you that I go away because as long as I do not go away, the Advocate will not come to you. But if I go, I will send him to you.
13
When the Spirit of truth comes, he will guide you to all truth. For he will not speak of his own authority but will speak on what he hears, and he will declare to you the things which are to come.

Commentaries
The Work of the Spirit
A deep sadness overwhelms the disciples when they realize that Jesus is leaving. However, Jesus comforts them with the promise of the Spirit, who will confirm and strengthen their faith during times of crisis and persecution. The Spirit will deliver his verdict against the world for three reasons: 1. Because of sin—specifically, lack of faith or infidelity. Not believing in Jesus as the Son of God is the greatest sin in the fourth Gospel. 2. Because of justice—since Jesus’ exaltation on the cross is a triumph. Jesus’ return to the Father is a reward and victory. It also functions as legal justice, pronouncing and establishing the final judgment—the sentence against the guilty world. 3. Because of judgment—a judgment that becomes condemnation because it is disproportionate to the ultimate triumph of Jesus Christ.