He Must Increase
John 3:31-36
The entire Christian faith rests on the correct answer to Jesus’ question (Matt. 16:15), “Who do you say that I am?” If you get that question right, everything else is secondary. If Jesus is who the Bible proclaims Him to be, then you must believe in Him as your Savior and Lord or you will face judgment. Either Christ died for your sins and is risen from the dead or not. If He is not who He claimed to be, then you’re wasting your time being a Christian (1 Cor. 15:13-19).
As John writes his Gospel he is clear as to who Jesus is and what our response should be to Him (20:31): “these are written that you may believe that Jesus is the Christ, the Son of God, and that believing you may have life in His name.”
Everything in the Gospel of John is written to reveal Jesus Christ, the Son of God to us so that we would believe and have eternal life. Every story in this Gospel, every verse, every phrase is here to show us the glory of Jesus Christ so that we would receive God’s gracious gift of eternal life: a relationship with God through Jesus Christ. As Jesus prays in John 17:3, “And this is eternal life, that they may know You, the only true God, and Jesus Christ whom You have sent.”
That is what is happening in every text of this Gospel in one way or another. Jesus is being held up as glorious—magnificent, splendid, supreme—full of grace and truth (Piper, The Father Has Given All Things into Jesus’s Hands). And as we see Him for who He really is Jesus becomes for us the most precious reality in the world to us. In the words of John the Baptist (3:30), “He must increase, but I must decrease.”