Bede the Venerable — as excerpted in the Catena Aurea on Mark 1:40-45

“(in Marc. i. 9) And because the Lord said that He came not to destroy the Law but to fulfill, (Matt. 5:17) he who was excluded by the Law, inferring that he was cleansed by the power of the Lord, shewed that that grace, which could wash away the stain of the leper, was not from the Law, but over the Law. And truly, as in the Lord authoritative power, so in him the constancy of faith is shewn; for there follows, Lord, if thou wilt, thou canst make me clean. He falls on his face, which is at once a gesture of lowliness and of shame, to shew that every man should blush for the stains of his life. But his shame did not stifle confession; he shewed his wound, and begged for medicine, and the confession is full of devotion and of faith, for he refers the power to the will of the Lord.”