St. Mark recounts that the Lord was moved with compassion for the leper (see Mk. 1:41), which is beautifully expressed. The Evangelists have repeated this sentiment frequently, aiming to bolster our faith and inspire our imitation: they present miraculous deeds to strengthen belief and virtuous actions to encourage emulation. The Lord touched the leper without disdain and issued the command without hesitation; in this act, His authority is revealed, as He possesses both the power to heal and the command to issue. I desire, He affirms, countering Photinus; He commands, contesting Arius; He touches, disproving the Manichaeans.
Moreover, not just one individual receives cleansing from leprosy, but all who hear the words directed at them: You have already been cleansed through the word I have proclaimed to you (John 15:3). If leprosy is healed through the Word, then neglecting the Word becomes the leprosy of the soul.
It is also remarkable that He healed in the manner requested. If You are willing, You can cleanse me. 'I am willing,' He replied, 'be cleansed' (Luke 5:12, 13). His will is evident here, along with His gracious disposition: He reached out His hand and touched him (Luke 5:13). The law prohibits touching lepers, yet the Lord of the law does not adhere to it; rather, He fulfills and establishes the law. Thus, He touched not because He was incapable of healing without such contact, but to demonstrate that He is above the law and unafraid of contamination as mere mortals might be. From His touch, the leprosy, which typically inflicts the one who touches, fled, for the Lord, who liberates others from impurity, could not Himself be defiled.