Master, we saw one. Hence it is evident that the name of Christ was at that time so celebrated, that persons who were not of the number of his intimate disciples used that name, or perhaps even abused it, for I will not venture to avouch any thing on this point as certain. It is possible that he who is here mentioned had embraced the doctrine of Christ, and betaken himself to the performance of miracles with no bad intention; but as Christ bestowed this power on none but those whom he had chosen to be heralds of his Gospel, I think that he had rashly taken, or rather seized upon, this office. Now though he was wrong in making this attempt, and in venturing to imitate the disciples without receiving a command to do so, yet his boldness was not without success: for the Lord was pleased, in this way also, to throw luster around his name, as he sometimes does by means of those of whose ministry he does not approve as lawful. It is not inconsistent with this to say, that one who was endued with special faith followed a blind impulse, and thus proceeded inconsiderately to work miracles. I now come to John and his companions. They say that they forbade a man to work miracles Why did they not first ask whether or not he was authorized? For now being in a state of doubt and suspense, they ask the opinion of their Master. Hence it follows, that they had rashly taken on themselves the right to forbid; and therefore every man who undertakes more than he knows that he is permitted to do by the word of God is chargeable with rashness. Besides, there is reason to suspect the disciples of Christ of ambition, because they are anxious to maintain their privilege and honor. For how comes it that they all at once forbid a man who is unknown to them to work miracles, but because they wish to be the sole possessors of this right? For they assign the reason, that he followeth not Christ; as much as to say, "He is not one of thy associates, as we are: why then shall he possess equal honor?"

We saw one - There is no improbability in supposing that this might have been one of the disciples of John, or one of the seventy whom Jesus had sent out, and who, though he did not "personally" attend on Jesus, yet had the power of working miracles. There is no evidence that he was merely an "exorcist," or that he used the name of Jesus merely as a pretence.

We saw one casting out devils in thy name - It can scarcely be supposed that a man who knew nothing of Christ, or who was only a common exorcist, could be able to work a miracle in Christ's name; we may therefore safely imagine that this was either one of John the Baptist's disciples, who, at his master's command, had believed in Jesus, or one of the seventy, whom Christ had sent out, Luke 10:1-7, who, after he had fulfilled his commission, had retired from accompanying the other disciples; but as he still held fast his faith in Christ, and walked in good conscience, the influence of his Master still continued with him, so that he could cast out demons as well as the other disciples.
He followeth not us - This first clause is omitted by BCL, three others, Syriac, Armenian, Persic, Coptic, and one of the Itala. Some of the MSS. and versions leave out the first; some the second clause: only one of them is necessary. Griesbach leaves out the first.
We forbade him - I do not see that we have any right to attribute any other motive to John than that which he himself owns - because he followed not us - because he did not attach himself constantly to thee, as we do, we thought he could not be in a proper spirit.

(9) And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbad him, because he followeth not us.
(9) God, who normally works through ordinary means, works also extraordinarily as often as it pleases him. But an extraordinary means is tested by the doctrine and the effects.

And John answered him, saying,.... Taking notice of what Christ just now said, and observing how well pleasing it was to him, to receive in a meek and humble manner, the least believer in his name; and reflecting upon an action, in which he and some of his fellow disciples were concerned, and which he perceived was not so agreeable to this rule of Christ, thought proper to relate it to him; that he might have his sense of it, and give him an opportunity of enlarging on a subject, so suitable to the temper and disposition of this beloved disciple.
Master, we saw one casting out devils in thy name: very likely he called him Rabbi, as the Syriac version renders it, or Rabboni, as in John 20:16, a title commonly given to Christ, both by his disciples and others: the case related, very probably happened, when the disciples being sent forth by Christ to preach the Gospel and cast out devils, took a tour through Judea and Galilee, where they saw this man. John was not alone; there were others with him, at least another, who was an eyewitness with him; for the apostles were sent out, by two and two: who this man was, is not said, his name is not mentioned, perhaps was unknown to the apostles; though Beza says, in one ancient exemplar it is read, "we knew one". This person not only attempted to cast out devils, but really did; and that more than one; but in which of Christ's names he did it, is not expressed; if in the name of the Messiah, Dr. Lightfoot's conjecture may be right, that he was one of John's disciples; who had been baptized in the name of the Messiah, that was just expected to come; to whom, as to others of his disciples, was given a power of casting out devils, to make the way of the Messiah more plain; wherefore the reason why he did not cast out devils in the name of Jesus, but in the name of the Messiah, and did not follow him, nor his disciples, was not out of contempt, but ignorance, not knowing that Jesus of Nazareth was the Messiah: or if he cast out devils in the name of Jesus, which seems most likely, he might be, as others think, a disciple of John's, who really did believe in Jesus, though he did not associate with, his disciples, but continued with the disciples of John: wherefore it is said,
and he followeth not us; was neither one of the twelve apostles; nor one of the seventy disciples; nor even one of the lower class of the professed disciples of Jesus. This clause is omitted in the Syriac, Arabic, Persic, and Ethiopic versions:
and we forbad him; going on in this way, casting out any more devils:
because he followeth, not us; was not one of their company, nor any of Christ's disciples; who had received no authority and commission from Christ, to do what he did: wherefore they feared, that by such an irregular way of proceeding, the dignity of Christ would be lessened, and some dishonour and reproach reflected on him: and besides the honour of Christ, they might consult their own; and their case be too much like that of Joshua, when Eldad and Medad prophesied in the camp. This clause is left out in the Vulgate Latin, but stands in all the eastern versions.

And John answered him, saying, Master, we saw one casting out devils in thy name, and he followeth not us: and we forbade him, because he followeth not us--The link of connection here with the foregoing context lies, we apprehend, in the emphatic words which our Lord had just uttered, "in My name." "Oh," interposes John--young, warm, but not sufficiently apprehending Christ's teaching in these matters--"that reminds me of something that we have just done, and we should like to know if we did right. We saw one casting out devils "in Thy name," and we forbade him, because he followeth not us. Were we right, or were we wrong?" Answer--"Ye were wrong." "But we did it because he followeth not us." "No matter."

John answered him, we saw one. The disciples had shortly before returned to Christ from their first missionary tour, in which they were empowered to cast out devils (Matthew 10:8). The man here referred to they probably met during this tour. He must have been a disciple of Christ, who was enabled by his faith, yet without a commission, to cure the possessed--Abbott.
Casting out devils in thy name. Really, and not in a wrong spirit, as did the Jewish exorcists (Acts 19:13-14); for it was done in thy name. Such workers as this man believed in him, or they would not have used his name.
He followeth not us. Did not join himself to the apostles as one of their followers.

And John answered him - As if he had said, But ought we to receive those who follow not us? Master, we saw one casting out devils in thy name - Probably this was one of John the Baptist's disciples, who believed in Jesus, though he did not yet associate with our Lord's disciples. And we forbad him, because he followeth not us - How often is the same temper found in us? How readily do we also lust to envy? But how does that spirit become a disciple, much more a minister of the benevolent Jesus! St. Paul had learnt a better temper, when he rejoiced that Christ was preached, even by those who were his personal enemies. But to confine religion to them that follow us, is a narrowness of spirit which we should avoid and abhor. Luke 9:49.