(17) A dumb spirit.--This, again, is peculiar to St. Mark, as is also the "gnashing of the teeth" and the "pining" or "withering" in the next verse.

Verse 17. - One of the multitude answered him, Master I brought - the Greek is ἤνεγκα - unto thee my son. He brought his son, expecting to find Jesus; but failing in this, he applied to our Lord's disciples to cast out the evil spirit, but they could not. St. Matthew (Matthew 17:14) says that the man came kneeling to Christ, "and saying, Lord, have mercy on my son: for he is lunatic." The word in the Greek there is σεληνιάζεται. Etymologically, no doubt, "lunatic" conveys the meaning of the word most nearly. But the graphic description here of St. Mark corresponds exactly to epilepsy, and to epilepsy acted upon by an unclean spirit, who in this instance deprived the sufferer of his speech. Lunatics were so called from the prevailing impression, not without foundation, that the light and the changes of the moon have an influence upon the body, and so act through the body upon the mind. This influence seems to be recognized in Psalm 121:6, "The sun shall not smite thee by day, nor the moon by night."

9:14-29 The father of the suffering youth reflected on the want of power in the disciples; but Christ will have him reckon the disappointment to the want of faith. Very much is promised to our believing. If thou canst believe, it is possible that thy hard heart may be softened, thy spiritual diseases may be cured; and, weak as thou art, thou mayest be able to hold out to the end. Those that complain of unbelief, must look up to Christ for grace to help them against it, and his grace will be sufficient for them. Whom Christ cures, he cures effectually. But Satan is unwilling to be driven from those that have been long his slaves, and, when he cannot deceive or destroy the sinner, he will cause him all the terror that he can. The disciples must not think to do their work always with the same ease; some services call for more than ordinary pains.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.