26 So John's disciples came to him and said, "Rabbi, the man you met on the other side of the Jordan River, the one you identified as the Messiah, is also baptizing people. And everybody is going to him instead of coming to us." 27 John replied, "No one can receive anything unless God gives it from heaven. 28 You yourselves know how plainly I told you, 'I am not the Messiah. I am only here to prepare the way for him.' 29 It is the bridegroom who marries the bride, and the best man is simply glad to stand with him and hear his vows. Therefore, I am filled with joy at his success. 30 He must become greater and greater, and I must become less and less.
31 "He has come from above and is greater than anyone else. We are of the earth, and we speak of earthly things, but he has come from heaven and is greater than anyone else. 32 He testifies about what he has seen and heard, but how few believe what he tells them! 33 Anyone who accepts his testimony can affirm that God is true. 34 For he is sent by God. He speaks God's words, for God gives him the Spirit without limit. 35 The Father loves his Son and has put everything into his hands. 36 And anyone who believes in God's Son has eternal life. Anyone who doesn't obey the Son will never experience eternal life but remains under God's angry judgment."
Matthew Henry's Commentary on John 3:26-36
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.