Having met the Savior, therefore, the lepers earnestly besought Him to free them from their misery, and called Him Master, that is. Teacher. No one pitied them when suffering this malady, but He Who had appeared on earth for this very reason, and had become man that He might show pity to all, He was moved with compassion for them, and had mercy on them.
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homilies 113-116. B#42, pp. 465-466, 4th Century
And why did He not rather say, I will, be you cleansed; as He did in the case of another leper, but commanded them rather to show themselves to the priests? It was because the law gave directions to this effect to those who were delivered from leprosy (Lev. 14-2); for it commanded them to show themselves to the priests, and to offer a sacrifice for their cleansing.
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homilies 113-116. B#42, pp. 465-466, 4th Century
He commanded them to go, therefore, as being already healed, and, that they might, so to speak, bear witness to the priests, as rulers of the Jews, and ever envious of His glory, that wonderfully, and beyond their hope, they had been delivered from their misfortune by Christ's willing that they should be healed ... (Cf. Luke 5:12) ...
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homilies 113-116. B#42, pp. 465-466, 4th Century
The nine then, as being Jews, falling into a thankless forgetfullness, did not return to give glory to God; by which He shows that Israel was hard of heart, and utterly unthankful: but the stranger returned with a loud voice to glorify God. It shows, therefore, that the Samaritans were grateful, but that the Jews, even when benefitted, were ungrateful.
St. Cyril of Alexandria
Commentary on the Gospel of St. Luke, Homilies 113-116. B#42, pp. 465-466, 4th Century