Master, I have brought to thee my son. Matthew describes a different sort of disease from what is described by Mark, for he says that the man was lunatic But both agree as to these two points, that he was dumb, and that at certain intervals he became furious. The term lunatic is applied to those who, about the waning of the moon, are seized with epilepsy, or afflicted with giddiness. I do not admit the fanciful notion of Chrysostom, that the word lunatic was invented by a trick of Satan, in order to throw disgrace on the good creatures of God; for we learn from undoubted experience, that the course of the moon affects the increase or decline of these diseases. And yet this does not prevent Satan from mixing up his attacks with natural means. I am of opinion, therefore, that the man was not naturally deaf and dumb, but that Satan had taken possession of his tongue and ears; and that, as the weakness of his brain and nerves made him liable to epilepsy, Satan availed himself of this for aggravating the disease. The consequence was, that he was exposed to danger on every hand, and was thrown into violent convulsions, which left him lying on the ground, in a fainting state, and like a dead man. Let us learn from this how many ways Satan has of injuring us, were it not that he is restrained by the hand of God. Our infirmities both of soul and body, which we feel to be innumerable, are so many darts with which Satan is supplied for wounding us. We are worse than stupid, if a condition so wretched does not, arouse us to prayer. But in this we see also an amazing display of the goodness of God, that, though we are liable to such a variety of dangers, he surrounds us with his protection; particularly if we consider with what eagerness our enemy is bent on our destruction. We ought also to call to remembrance the consoling truth, that Christ has come to bridle his rage, and that we are safe in the midst of so many dangers, because our diseases are effectually counteracted by heavenly medicine. We must attend also to the circumstance of the time. The father replies, that his son had been subject to this grievous disease from his infancy. If Satan was permitted to exert his power, to such an extent, on a person of that tender age, what reason have not we to fear, who are continually exposing ourselves by our crimes to deadly strokes, who even supply our enemy with darts, and on whom he might justly be permitted to spend his rage, if it were not kept under restraint by the astonishing goodness of God?

A dumb spirit - A spirit which deprived his son of the power of speaking.

A dumb spirit - That is, a demon who afflicted those in whom it dwelt with an incapacity of speaking. The spirit itself could not be either deaf or dumb. These are accidents that belong only to organized animate bodies. See this case explained, Matthew 17:14 (note), etc.

And one of the multitude answered and said,.... The Scribes made no reply, being afraid to engage with him, whom they had often found too hard for them; and the disciples, if they were spoken to, were silent, through shame, because they had not succeeded in the cure of the person brought to them, which gave their enemies an handle against them: wherefore the parent of the afflicted child made answer, saying; the occasion of this debate between the Scribes, and thy disciples, is as follows:
Master, I have brought unto thee my son, which hath a dumb spirit; signifying, that he had heard much of him, as a very great man, and he believed him to be a master in Israel, who was famous both for doctrine and miracles, and therefore he brought his son to him, to be cured by him; but Christ not being in the way, he proposed him to his disciples, who attempted it without success. The case of his son was, he had a "dumb spirit". The Evangelist Matthew says he was "lunatic", Matthew 17:15; and by his account of him it appears, that he had the "epilepsy", or falling sickness; and which, when upon him, took away the use of his speech. And so the Jews ascribe dumbness to the violence of a disease: thus they ask (g);
"what is "Cordiacus" (kardiakov)? one that has a disorder which affects the heart, and causes a deliquium (a fainting and swooning away), but a man, , "who is become dumb", through the force of a disease;''
which was the case of this child: though this disease did not arise from natural causes, but from a diabolical possession; for he had a spirit, a foul spirit, a devil, as he is called: some further account is given of this unhappy case, in the next verse.
(g) Jarchi in Misn. Gittin, c. 7. sect. 1.

And one of the multitude answered, and said, Master, I have brought unto thee my son--"mine only child" (Luke 9:38).
which hath a dumb spirit--a spirit whose operation had the effect of rendering his victim speechless, and deaf also (Mark 9:25). In Matthew's report of the speech (Matthew 17:15), the father says "he is lunatic"; this being another and most distressing effect of the possession.

And one of the multitude answering - The scribes gave no answer to our Lord's question. They did not care to repeat what they had said to his disciples. A dumb spirit - A spirit that takes his speech from him.