But there is one point of analogy [to Ed McMahon pointing out Johnny Carson and not himself as the star], and one only: the delight and joy of the Holy Spirit is not to train attention upon Himself. The Holy Spirit's great love, fascination, and focus, is the Lord Jesus Christ.
Before the Incarnation, the Spirit moved in the prophets. And of what did He speak through them? Among other things, He spoke of the sufferings of Christ, and of His glories to follow (1 Peter 1:11).
The Holy Spirit performed the miracle by which the virgin, Mary, became mother to the human nature of the Messiah (Matthew 1:18,20; Luke 1:35). He appeared at Jesus' baptism, not to flutter in mid-air while until everyone noticed and admired Him, but to rest on Christ, to mark Him out as Yahweh's anointed (Matthew 3:16; cf. Luke 4:18).
And so the power of the Spirit continued in the ministry of Jesus, to guide Him in what He did (Matthew 4:1), and to bring glory and honor to Jesus, marking Him as God's Son (Matthew 12:28; Acts 10:38). This He did preeminently in Jesus' resurrection from the dead (Romans 1:4).
And what would the Spirit do after Christ's resurrection and ascension? More of the same. "He will glorify me," Jesus says of the Spirit, "for he will take what is mine and declare it to you" (John 16:14). It is worth repetition: "He will glorify me." In fact, the Greek is a bit more emphatic: "That one, Me will He glorify." The Spirit will come to bring glory, and it is to Jesus that He will bring this glory.
Imagine that. God though He is, personal though He is, the Spirit's aim is not to glorify Himself. It is to glorify Jesus. And how does the Holy Spirit do that? By imparting inerrant revelation to the apostles, revelation which we have today in the Bible alone. He did this by granting them inerrant memory of Jesus' words (John 14:26), by bearing witness to them about Jesus (John 15:26), by convicting the world of truths related in each case to Jesus (John 16:8-11), and by continuing to tell them the "many things" that Jesus still had to say to them (John 16:12-13). Jesus emphasizes this last point, assuring the apostles that the Spirit would not speak aph' heautou, from Himself, but rather from Jesus.
When the Holy Spirit wrote a book, what was it about? At least one has to confess that the Holy Spirit's recurrent theme, strain, melody, was the person and work of Christ (Luke 24:25-27, 44-46; Acts 3:18; 10:43;24:14; 26:22-23). If I may put it this way, you could almost re-title the New Testament "Here's Jesus."