The better news of humanity: Jesus Christ has conquered the world!
The apostle John tells us that the loss of the physical presence of Jesus would be more than compensated by the coming of the Holy Spirit, because the ministry of the Spirit among non-believers is that of conviction, specifically, He uses his unbelief to prove the gravity of the Spirit. sin (v9), the triumphant work of Christ to prove the availability of justice (v 10), and the defeat of satan to prove the solemn certainty of the judgment (v 11).
Before Jesus had promised the apostles that the Spirit would remind them of his teachings, now he promises them that the Spirit will guide them to the whole truth, which they could not understand at that time.
Thank God, for sealing us with his Holy Spirit, and today understanding that truth in our lives.