Forbid him not - Do not prevent his doing good. If he can work a miracle in my name, it is sufficient proof of attachment to me, and he should not be prevented.

Can lightly speak evil of me - The word here rendered "lightly" means quickly or "immediately." The meaning of the passage is, that he to whom God gave the power of working a miracle, by that gave evidence that he could not be found among the enemies of Jesus. He ought not, therefore, to be prevented from doing it. There is no reason to think here that John had any improper designs in opposing the man. He thought that it was evidence that he could not be right, because he did not join them and follow the Saviour. Our Lord taught him differently. He opposed no one who gave evidence that he loved him. Wherever he might be or whatever his work, yet, if he did it in the name of Jesus and with the approbation of God, it was evidence sufficient that he was right. Christians should rejoice in good done by their brethren of any denomination. There are men calling themselves Christians who seem to look with doubt and suspicion on all that is done by those who do not walk with them. They undervalue their labors, and attempt to lessen the evidences of their success and to diminish their influence. True likeness to the Saviour would lead us to rejoice in all the good accomplished. by whomsoever it may be done - to rejoice that the kingdom of Christ is advanced, whether by a Presbyterian, an Episcopalian, a Baptist, or a Methodist. Compare Philippians 1:18.

Forbid him not - If you meet him again, let him go on quietly in the work in which God owns him. If he were not of God, the demons would not be subject to him, and his work could not prosper. A spirit of bigotry has little countenance from these passages. There are some who are so outrageously wedded to their own creed, and religious system, that they would rather let sinners perish than suffer those who differ from them to become the instruments of their salvation. Even the good that is done they either deny or suspect, because the person does not follow them. This also is vanity and an evil disease.

But Jesus said, forbid him not,.... Neither him, nor any other they should hereafter meet with, who might be casting out devils in his name, giving this as a reason for it;

for there is no man which shall do a miracle in my name; or "miracles", as the Syriac version, as to cast out devils, or heal any sickness and disease,

that can lightly speak evil of me: such a man can never reproach and blaspheme that name, which he makes use of in doing, and by which he does wonderful works; no man can call Jesus accursed, who casts out devils in his name; see 1 Corinthians 12:3, if he has spoken evil of him before, he cannot do it "again", as the Persic version renders it, with any face; or he cannot do it "quickly, immediately", as the Vulgate Latin, Syriac, Arabic, and Ethiopic versions interpret it: there must be some time before such an one apostatizes, if he ever does; he cannot very easily and readily go into a way of blaspheming that name, by which he does his mighty works: his conscience will not admit of it; and besides, it would be contrary to his interest; it must sink his credit, and he lose the esteem and applause of men, he had gained by his miracles; for to dishonour that name, would be to reproach himself.

But Jesus said, Forbid him not: for there is no man which shall do a miracle in my name, that can lightly speak evil of me.

9:39 Forbid him not. He neither praises nor blames him for following an independent course, and not working with his disciples. He simply declares that he must not be forbidden, and that those who work the same kind of work that we do should be regarded not as enemies, but allies. Thousands, in every period of church history, have spent their lives in copying John's mistake. They have labored to stop every man who will not work for Christ in their way from working for Christ at all (Ryle).

9:39 Jesus said - Christ here gives us a lovely example of candour and moderation. He was willing to put the best construction on doubtful cases, and to treat as friends those who were not avowed enemies. Perhaps in this instance it was a means of conquering the remainder of prejudice, and perfecting what was wanting in the faith and obedience of these persons. Forbid him not - Neither directly nor indirectly discourage or hinder any man who brings sinners from the power of Satan to God, because he followeth not us, in opinions, modes of worship, or any thing else which does not affect the essence of religion.

Margin miracle

work of power upon my name, who will find it possible soon [after] to revile me.

39. But Jesus said, Forbid him not: for there is no man which shall do a miracle in my name, that can lightly speak evil of me-soon, that is, readily "speak evil of me."

9:30-40 The time of Christ's suffering drew nigh. Had he been delivered into the hands of devils, and they had done this, it had not been so strange; but that men should thus shamefully treat the Son of man, who came to redeem and save them, is wonderful. Still observe that when Christ spake of his death, he always spake of his resurrection, which took the reproach of it from himself, and should have taken the grief of it from his disciples. Many remain ignorant because they are ashamed to inquire. Alas! that while the Saviour teaches so plainly the things which belong to his love and grace, men are so blinded that they understand not his sayings. We shall be called to account about our discourses, and to account for our disputes, especially about being greater than others. Those who are most humble and self-denying, most resemble Christ, and shall be most tenderly owned by him. This Jesus taught them by a sign; whoever shall receive one like this child, receives me. Many have been like the disciples, ready to silence men who have success in preaching to sinners repentance in Christ's name, because they follow not with them. Our Lord blamed the apostles, reminding them that he who wrought miracles in his name would not be likely to hurt his cause. If sinners are brought to repent, to believe in the Saviour, and to live sober, righteous, and godly lives, we then see that the Lord works by the preacher.