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11. Elijah indeed will come first. We have stated elsewhere the origin of that error which prevailed among the Jews. As John the Baptist was to resemble Elijah by restoring the fallen condition of the Church, the prophet Malachi (4:5,6) had even given to him the name of Elijah; and this had been rashly interpreted by the scribes, as if Elijah the Tishbite (1 Kings 17:1) were to return a second time to the world. Christ now declares that every thing which Malachi uttered was true, but that his prediction had been misunderstood and distorted from its true meaning. “The promise,” says he, “that Eliah would come was true, and has been already fulfilled; but the scribes have already rejected Elijah, whose name they idly and falsely plead in opposing me.”

And will restore all things. This does not mean that John the Baptist restored them perfectly, but that he conveyed and handed them over to Christ, who would complete the work which he had begun. Now as the scribes had shamefully rejected John, Christ reminds his disciples that the impostures of such men ought not to give them uneasiness, and that it ought not to be reckoned strange, if, after having rejected the servant, they should, with equal disdain, reject his Master. And that no one might be distressed by a proceeding so strange, our Lord mentions that the Scripture contained predictions of both events, that the Redeemer of the world, and Elijah his forerunner, would be rejected by false and wicked teachers.

Matthew 17:17. O unbelieving and rebellious nation. Though Christ appears to direct his discourse to the father of the lunatic, yet there can be no doubt that he refers to the scribes, as I have lately explained; for it is certain that the reproof is directed, not against ignorant and weak persons, but against those who, through inveterate malice, obstinately resist God. This is the reason why Christ declares that they are no longer worthy to be endured, and threatens that ere long he will separate from them. But nothing worse could happen to them than that Christ should leave them, and it was no light reproach that they rejected so disdainfully the grace of their visitation. We must also observe here, that we ought to treat men in various ways, each according to his natural disposition. For, while our Lord attracts to him the teachable by the utmost mildness, supports the weak, and gently arouses even the sluggish, he does not spare those crooked serpents, on whom he perceives that no remedies can effect a cure.

Matthew 17:19. Then the disciples coming. The disciples wonder that the power which they once possessed has been taken from them; but they had lost it by their own fault. Christ therefore attributes this want of ability to their unbelief, and repeats and illustrates more largely the statement which he had previously made, that nothing is impossible to faith It is a hyperbolical mode of expression, no doubt, when he declares that faith removes trees and mountains; but the meaning amounts to this, that God will never forsake us, if we keep the door open for receiving his grace. He does not mean that God will give us every thing that we may mention, or that may strike our minds at random. On the contrary, as nothing is more at variance with faith than the foolish and irregular desires of our flesh, it follows that those in whom faith reigns do not desire every thing without discrimination, but only that which the Lord promises to give. Let us therefore maintain such moderation as to desire nothing beyond what he has promised to us, and to confine our prayers within that rule which he has laid down.

But it may be objected, that the disciples did not know whether or not the Lord was pleased to cure the lunatic It is easy to reply, that it was their own fault if they did not know; for Christ is now speaking expressly about special faith, which had its secret instincts, as the circumstances of the case required. And this is the faith of which Paul speaks, (1 Corinthians 12:9.) How then came it that the apostles were deprived of the power of the Spirit, which they had formerly exercised in working miracles, but because they had quenched it by their indolence? But what Christ said about special faith, in reference to this particular event, may be extended to the common faith of the whole Church.

21. This kind goeth not out, ⁴⁹²⁴⁹²     “Cest espece [de diablos] ne sort point;” — “this kind [of devils] goeth not out.” By this expression Christ reproved the negligence of certain persons, in order to inform them that it was not an ordinary faith which was required; for otherwise they might have replied that they were not altogether destitute of faith The meaning therefore is, that it is not every kind of faith that will suffice, when we have to enter into a serious conflict with Satan, but that vigorous efforts are indispensably necessary. For the weakness of faith he prescribes prayer as a remedy, to which he adds fasting by way of an auxiliary. “You are effeminate exorcist,” said he, “and seem as if you were engaged in a mock-battle got up for amusement; ⁴⁹³⁴⁹³     “Vous y venez ainsi qu’a un combat de petits enfans, et comme s’il n’estoit question que de s’escarmoucher pour passe-temps.” — “You come to it as if it were to a fight of little children, and as if you had nothing to do but to skirmish for amusement.” but you have to deal with a powerful adversary, who will not yield till the battle has been fought out. Your faith must therefore be excited by prayer, and as you are slow and languid in prayer, you must resort to fasting as an assistance.” ⁴⁹⁴⁴⁹⁴     “Comme une aide pour vous exciter et enflamber;” — “as an assistance to excite and inflame you.” Hence it is very evident how absurdly the Papists represent fasting to be the specific method of driving away devils, since our Lord refers to it for no other reason than to stimulate the earnestness of prayer. When he says that this kind of devils cannot be cast out in any other way than by prayer and fasting, he means that, when Satan has taken deep root in any one, and has been confirmed by long possession, or when he rages with unbridled fury, the victory is difficult and painful, and therefore the contest must be maintained with all our might.