Jesus said to his disciples:

5 "But now I am going to him who sent me, and none of you asks me, ‘Where are you going?’ 6 But because I have told you these things, sorrow has filled your heart. 7 Nevertheless I tell you the truth: It is to your advantage that I go away, for if I don’t go away, the Counselor won’t come to you. But if I go, I will send him to you. 8 When he has come, he will convict the world about sin, about righteousness, and about judgment; 9 about sin, because they don’t believe in me; 10 about righteousness, because I am going to my Father, and you won’t see me any more; 11 about judgment, because the prince of this world has been judged."

John 16:5-11 - World English Bible

In John 16, Jesus calmed the anxieties of his followers. Yes, he would leave them, but, in his absence, he would send them the Spirit to reinforce their apocalyptic world view (i.e., "convict them"). The Spirit would focus on sin, righteousness and judgment. Jesus defined sin as disbelief, rejection of the Son of Man. He pointed to righteousness, not as the acts of a faith-filled person, but on the will of God; to fulfill that will, he would have to ascend to his Father and the disciple would believe he did, indeed, returned. Finally, he spoke of judgment; the forces of evil would be condemned. These three topics added together fit into an outlook that saw God acting towards the dawn of his Kingdom.

How does the Spirit help you with your faith and your hope in a future life with God?