Jesus is getting the disciples ready for his death. He is trying to tell them about his resurrection and that he will send the Holy Spirit. He is trying to instill HOPE in them. He is trying to tell them that their belief in his words, his life, his resurrection, will be the truth that guides them for all time. For all people.
Are you letting it guide you? Are you helping others find the truth and letting the spirit guide them? We will all travel many roads, high and lows, but the Spirit is always there with us.