28 You yourselves give witness that I said, I am not the Christ. What I said was, I am sent before the Christ. 29 He who has the bride is the husband: but the husband's friend, whose place is by his side and whose ears are open to him, is full of joy because of the husband's voice: such is my joy, and it is complete. 30 He has to become greater while I become less.
Matthew Henry's Commentary on John 3:28-30
Commentary on John 3:22-36
(Read John 3:22-36)
John was fully satisfied with the place and work assigned him; but Jesus came on a more important work. He also knew that Jesus would increase in honour and influence, for of his government and peace there would be no end, while he himself would be less followed. John knew that Jesus came from heaven as the Son of God, while he was a sinful, mortal man, who could only speak about the more plain subjects of religion. The words of Jesus were the words of God; he had the Spirit, not by measure, as the prophets, but in all fulness. Everlasting life could only be had by faith in Him, and might be thus obtained; whereas all those, who believe not in the Son of God, cannot partake of salvation, but the wrath of God for ever rests upon them.