John 3:30

He (Christ) must increase, not in virtue and perfection, with which he is replenished, but in the opinion of the world, when they begin to know him, and believe in him: and in like manner, I must be diminished, when they know how much he is above me. (Witham)

Christ, whose the church is by a right of redemption, and by its having given up itself to him, 2Co 8:5, he is the Bridegroom of it, Mat 22:2 2Co 11:2 Eph 5:23,25,29; as his Father was the Husband of the Jewish church; it belongeth to him to give laws to it, and to order matters and affairs in it. I am but as one who is one of the children of the bride chamber, Mat 9:15, and have by my preaching prepared the people of the Jews for him; and instead of being troubled to hear that he is come, I rejoice greatly to hear his voice. So far am I from repining to hear that multitudes go to him, that that is, I have no greater satisfaction than to hear it.

(4.) He owns it highly fit and necessary that the reputation and interest of Christ should be advanced, and his own diminished (v. 30): He must increase, but I must decrease. If they grieve at the growing greatness of the Lord Jesus, they will have more and more occasion to grieve, as those have that indulge themselves in envy and emulation. John speaks of Christ's increase and his own decrease, not only as necessary and unavoidable, which could not be helped and therefore must be borne, but as highly just and agreeable, and affording him entire satisfaction. [1.] He was well pleased to see the kingdom of Christ getting ground: "He must increase. You think he has gained a great deal, but it is nothing to what he will gain." Note, The kingdom of Christ is, and will be, a growing kingdom, like the light of the morning, like the grain of mustard-seed. [2.] He was not at all displeased that the effect of this was the diminishing of his own interest: I must decrease. Created excellencies are under this law, they must decrease. I have seen an end of all perfection. Note, First, The shining forth of the glory of Christ eclipses the lustre of all other glory. The glory that stands in competition with Christ, that of the world and the flesh, decreases and loses ground in the soul as the knowledge and love of Christ increase and get ground; but it is here spoken of that which is subservient to him. As the light of the morning increases, that of the morning star decreases. Secondly, If our diminution or abasement may but in the least contribute to the advancement of Christ's name, we must cheerfully submit to it, and be content to be any thing, to be nothing, so that Christ may be all.

(1.) John acquiesces in the divine disposal, and satisfies himself with that (v. 27): A man can receive nothing except it be given him from heaven, whence every good gift comes (James 1 17), a general truth very applicable in this case. Different employments are according to the direction of divine Providence, different endowments according to the distribution of the divine grace. No man can take any true honour to himself, Heb 5 4. We have as necessary and constant a dependence upon the grace of God in all the motions and actions of the spiritual life as we have upon the providence of God in all the motions and actions of the natural life: now this comes in here as a reason, [1.] Why we should not envy those that have a larger share of gifts than we have, or move in a larger sphere of usefulness. John reminds his disciples that Jesus would not have thus excelled him except he had received it from heaven, for, as man and Mediator, he received gifts; and, if God gave him the Spirit without measure (v. 34), shall they grudge at it? The same reason will hold as to others. If God is pleased to give to others more ability and success than to us, shall we be displeased at it, and reflect upon him as unjust, unwise, and partial? See Matt 20 15. [2.] Why we should not be discontented, though we be inferior to others in gifts and usefulness, and be eclipsed by their excellencies. John was ready to own that it was the gift, the free gift, of heaven, that made him a preacher, a prophet, a baptist: it was God that gave him the interest he had in the love and esteem of the people; and, if now his interest decline, God's will be done! He that gives may take. What we receive from heaven we must take as it is given. Now John never received a commission for a standing perpetual office, but only for a temporary one, which must soon expire; and therefore, when he has fulfilled his ministry, he can contentedly see it go out of date. Some give quite another sense of these words: John had taken pains with his disciples, to teach them the reference which his baptism had to Christ, who should come after him, and yet be preferred before him, and do that for them which he could not do; and yet, after all, they dote upon John, and grudge this preference of Christ above him: Well saith John, I see a man can receive (that is, perceive) nothing, except it be given him from heaven. The labour of ministers if all lost labour, unless the grace of God make it effectual. Men do not understand that which is made most plain, nor believe that which is made most evident, unless it be given them from heaven to understand and believe it.

Verses 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.