"But the friend of the bridegroom, which standeth and heareth him, rejoiceth greatly because of the bridegroom’s voice" (verse 29). This is very blessed. Notice first, how we have repeated here what we called attention to when considering John 1:35-37: the two disciples of John "stood" before they heard their master "speak" and say "Behold the lamb of God." The order is the same in the verse now before us—"Which standeth and heareth him." Standing signifies the cessation of activity: it denotes an act of concentrated attention. The principle illustrated is a deeply important one. It is one which needs to be pressed in this day of hustling and bustling about, which is only the product of the energy of the flesh. We must "stand" before we can "hear Him."
"This my joy therefore is fulfilled" (verse 29). How precious is this! Joy of heart is the fruit of being "occupied with Christ!" It is standing and hearing His voice which delights the soul. But again we say that the all-important prerequisite for this is a cessation of the activities of the flesh. His voice cannot be heard if we are rushing hither and thither in fellowship with the fearful bedlam all around us. The "better part" is not to be like Martha—"cumbered about much serving"—but is to "sit" at the feet of the Lord Jesus like Mary did, hearing His word (see Luke 10:38-42). Notice, too, the tense of the verbs in John 3:29: "standeth and heareth." The perfect tense expresses continuous action: again and again, daily, this must be done, if our joy is to be filled full. Is not our failure at this very point the explanation of our joyless lives?
"He must increase, but I must decrease" (John 3:30). Blessed climax was this to the lovely modesty of John, and well calculated to crush all party feeling and nip in the bud any jealousy there might be in the hearts of his own disciples. In principle this is inseparably connected with what he had just said before in the previous verse. The more I "decrease" the more I delight in standing and hearing the voice of that blessed One who is Altogether Lovely. And so conversely. The more I stand and hear His voice, the more will He "increase" before me, and the more shall I "decrease." I cannot be occupied with two objects at one and the same time. To "decrease" is, we take it, to be less and less occupied with ourselves. The more I am occupied with Christ, the less shall I be occupied with myself. Humility is not the product of direct cultivation, rather it is a by-product. The more I try to be humble, the less shall I attain unto humility. But if I am truly occupied with that One who was "meek and lowly in heart," if I am constantly beholding His glory in the mirror of God’s Word, then shall I be "changed into the same image from glory to glory, even as by the Spirit of the Lord" (2 Cor. 3:18).
The passage now before us contains the final testimony of the Baptist to the Lord Jesus Christ. In it the Savior and His servant are sharply contrasted. In witnessing to the manifold glories of his Master, John the Baptist draws a seven-fold contrast. First, John was one who could receive nothing, except it were given him from heaven (verse 27); where as Christ was the One to whom the Father "hath given all things" ( verse 35). Second, Jesus was the Christ, whereas John was only one "sent before Him" (verse 28). Third, Christ was the "bridegroom," whereas John was but the "friend" of the Bridegroom (verse 29). Fourth, Christ must "increase," whereas John himself must "decrease" (verse 30). Fifth, John was "of the earth," whereas the Lord Jesus had come "from above," and "is above all" (verse 31). Sixth, John had only a measure of the Spirit, but of Christ it is witnessed, "God giveth not the Spirit by measure unto him" (verse 34). Seventh, John was but a servant, whereas the Savior was none less than the Son of the Father (verse 35). What a blessed and complete testimony was this to the immeasurable superiority of the Lord of Glory!
A.W. Pink from his exposition on the Gospel of John