matthew 8:2 And, behold, there came a leper and worshipped him, saying, Lord, if thou wilt, thou canst make me clean. - Free Bible Online

      2. And, behold, there came a leper--"a man full of leprosy," says Lu 5:12. Much has been written on this disease of leprosy, but certain points remain still doubtful. All that needs be said here is that it was a cutaneous disease, of a loathsome, diffusive, and, there is reason to believe, when thoroughly pronounced, incurable character; that though in its distinctive features it is still found in several countries--as Arabia, Egypt, and South Africa--it prevailed, in the form of what is called white leprosy, to an unusual extent, and from a very early period, among the Hebrews; and that it thus furnished to the whole nation a familiar and affecting symbol of SIN, considered as (1) loathsome, (2) spreading, (3) incurable. And while the ceremonial ordinances for detection and cleansing prescribed in this case by the law of Moses (Le 13:1-14:57) held forth a coming remedy "for sin and for uncleanness" (Ps 51:7; 2Ki 5:1, 7, 10, 13, 14), the numerous cases of leprosy with which our Lord came in contact, and the glorious cures of them which He wrought, were a fitting manifestation of the work which He came to accomplish. In this view, it deserves to be noticed that the first of our Lord's miracles of healing recorded by Matthew is this cure of a leper.
      and worshipped him--in what sense we shall presently see. Mark says (Mr 1:40), he came, "beseeching and kneeling to Him," and Luke says (Lu 5:12), "he fell on his face."
      saying, Lord, if thou wilt, thou canst make me clean--As this is the only cure of leprosy recorded by all the three first Evangelists, it was probably the first case of the kind; and if so, this leper's faith in the power of Christ must have been formed in him by what he had heard of His other cures. And how striking a faith is it! He does not say he believed Him able, but with a brevity expressive of a confidence that knew no doubt, he says simply, "Thou canst." But of Christ's willingness to heal him he was not so sure. It needed more knowledge of Jesus than he could be supposed to have to assure him of that. But one thing he was sure of, that He had but to "will" it. This shows with what "worship" of Christ this leper fell on his face before Him. Clear theological knowledge of the Person of Christ was not then possessed even by those who were most with Him and nearest to Him. Much less could full insight into all that we know of the Only-begotten of the Father be expected of this leper. But he who at that moment felt and owned that to heal an incurable disease needed but the fiat of the Person who stood before him, had assuredly that very faith in the germ which now casts its crown before Him that loved us, and would at any time die for His blessed name.

JFB.