Matthew 8:3

"What then," saith one, "if the leper's opinion was mistaken?" It were meet to do away with it, and to reprove, and set it right. Did He then so do? By no means; but quite on the contrary, He establishes and confirms what had been said. For this cause, you see, neither did He say, "Be thou cleansed," but, "I will, be thou clean;" that the doctrine might no longer be a thing of the other's surmising, but of His own approval. But the apostles not so: rather in what way? The whole people being in amazement, they said, "Why give heed to us, as though by our own power or authority we had made him to walk?" But the Lord, though He spake oftentimes many things modestly, and beneath His own glory, what saith He here, to establish the doctrine of them that were amazed at Him for His authority? "I will, be thou clean." Although in the many and great signs which He wrought, He nowhere appears to have uttered this word. Here however, to confirm the surmise both of all the people and of the leper touching His authority, He purposely added, "I will." And it was not that He said this, but did it not; but the work also followed immediately. Whereas, if he had not spoken well, but the saying had been a blasphemy, the work ought to have been interrupted. But now nature herself gave way at His command, and that speedily, as was meet, even more speedily than the evangelist hath said. For the word, "immediately," falls far short of the quickness that there was in the work. But He did not merely say, "I will, be thou clean," but He also "put forth His hand, and touched him;" a thing especially worthy of inquiry. For wherefore, when cleansing him by will and word, did He add also the touch of His hand? It seems to me, for no other end, but that He might signify by this also, that He is not subject to the law, but is set over it; and that to the clean, henceforth, nothing is unclean. For this cause, we see, Elisha did not so much as see Naaman, but though he perceived that he was offended at his not coming out and touching him, observing the strictness of the law, he abides at home, and sends him to Jordan to wash. Whereas the Lord, to signify that He heals not as a servant, but as absolute master, doth also touch. For His hand became not unclean from the leprosy, but the leprous body was rendered clean by His holy hand. Because, as we know, He came not to heal bodies only, but also to lead the soul unto self-command. As therefore He from that time forward no more forbad to eat with unwashen hands, introducing that excellent law, which relates to the indifference of meats; just so in this case also, to instruct us for the future, that the soul must be our care;-that leaving the outward purifications, we must wipe that clean, and dread the leprosy thereof alone, which is sin (for to be a leper is no hindrance to virtue):-He Himself first touches the leper, and no man finds fault. For the tribunal was not corrupt, neither were the spectators under the power of envy. Therefore, so far from blaming, they were on the contrary astonished at the miracle, and yielded thereto: and both for what He said, and for what He did, they adored his uncontrollable power.

It is not to be read, as most of the Latins think, 'I will to cleanse thee;' but separately, He first answers, I will, and then follows the command, be thou clean. The leper has said, If thou wilt; the Lord answers, I will; he first said, Thou canst make me clean; the Lord spake, Be thou clean.

But though He transgressed the letter of the Law, He did not transgress its meaning. For the Law forbade to touch leprosy, because it could not hinder that the touch should not defile; therefore it meant not that lepers should not be healed, but that they that touched should not be polluted. So He was not polluted by touching the leprosy, but purified the leprosy by touching it. Had He healed him without speaking, who would know by whose power he had been healed? So the will to heal was for the sake of the leprous man; the word was for the sake of them that beheld, therefore He said, I will, be thou clean.

(De Fid. Orth. iii. 15.) For He was not only God, but man also, whence He wrought Divine wonders by touch and word; for as by an instrument so by His body the Divine acts were done.

(ubi sup.) Because he was not slow to believe, his cure is not delayed; he did not linger in his confession, Christ did not linger in His cure.