If thou canst do any thing, have compassion on us, and help us. We see how little honor he renders to Christ; for, supposing him to be some prophet, whose power was limited, he approaches to him with hesitation. On the other hand, the first foundation of faith is, to embrace the boundless power of God; and the first step to prayer is, to raise it above all opposition by the firm belief that our prayers are not in vain. As this man did not suppose Christ to be at all different from other men, his false opinion is corrected; for our faith must be so formed as to be capable and prepared for receiving the desired favor. In his reply Christ does not administer a direct reproof, but indirectly reminding the man of what he had said amiss, points out to him his fault, and informs him how a remedy may be obtained.

If thou canst do any thing - I have brought him to the disciples, and they could not help him. If thou canst do anything, have compassion.

If Thou canst Do any thing - I have already tried thy disciples, and find they can do nothing in this case; but if thou hast any power, in mercy use it in our behalf.

And ofttimes it hath cast him into the fire,.... When he has been near it; so that one part or other of his body has been scorched, or burnt, and his life in danger:
and into the waters to destroy him: when he has been near any brook, or river, it has thrown him into it, in order to drown him, as into the fire to burn him. The Ethiopic version before fire and water reads, "into the deep"; meaning either the sea or some deep pit, or off a precipice. All this is said to aggravate the case, and show the miserable condition the child was in, from the frequency of the fits, and the danger he was exposed to:
but if thou canst do any thing. This man's faith was very weak, and perhaps weaker than when he first came from home with his child. He had brought him to the disciples of Christ, and they could not cure him; the evil spirit was as strong, or stronger in him than ever; he now lay in a violent fit, and in a most miserable condition; so that he was almost ready to despair of healing: some small hopes he had that Christ might be able to relieve in this case; but he puts an if upon his power, and earnestly entreats him, if he had any, he would put it forth:
have compassion on us, and help us; his child that lay in such a deplorable condition, rolling on the ground at his feet; and himself, who was greatly afflicted for him: he tries, in very moving language, both the power and pity of Christ; and begs that if he had either, he would exert them on this occasion.

but if thou canst do anything, have compassion on us, and help us--"us," says the father; for it was a sore family affliction. Compare the language of the Syrophœnician woman regarding her daughter, "Lord, help me." Still nothing is done: the man is but struggling into faith: it must come a step farther. But he had to do with Him who breaks not the bruised reed, and who knew how to inspire what He demanded. The man had said to Him, "If Thou canst do."

If thou canst do any thing - In so desperate a case: Have compassion on us - Me as well as him.