“How then elsewhere does He bid them tell of it?” one may ask. Not as jostling with or opposing Himself, but as teaching men to be grateful. For neither in that place did He give command to proclaim Himself, but to “give glory to God;” by this leper training us to be clear of pride and vainglory, by the other to be thankful and grateful; and instructing on every occasion to offer to the Lord the praise of all things that befall us. That is, because men for the most part remember God in sickness, but grow slacker after recovery; He bids them continually both in sickness and in health to give heed to the Lord, in these words, “give glory to God.”
But wherefore did He command him also to show himself to the priest, and to offer a gift? To fulfill the law here again. For neither did He in every instance set it aside, nor in every instance keep it, but sometimes He did the one, sometimes the other; by the one making way for the high rule of life that was to come, by the other checking for a while the insolent speech of the Jews, and condescending to their infirmity. And why marvel, if just at the beginning He Himself did this, when even the very apostles, after they were commanded to depart unto the Gentiles, after the doors were opened for their teaching throughout the world, and the law shut up, and the commandments made new, and all the ancient things had ceased, are found sometimes observing the law, sometimes neglecting it?
But what, it may be said, does this saying, “Show yourself to the priest,” contribute to the keeping of the law? No little. Because it was an ancient law, that the leper when cleansed should not entrust to himself the judgment of his cleansing, but should show himself to the priest, and present the demonstration thereof to his eyes, and by that sentence be numbered among the clean. For if the priest said not “The leper is cleansed,” he remained still with the unclean without the camp. Wherefore he says, “Show yourself to the priest, and offer the gift that Moses commanded.” He said not, “which I command,” but for a time remits him to the law, by every means stopping their mouths. Thus, lest they should say, He had seized upon the priests' honor; though He performed the work Himself, yet the approving it He entrusted to them, and made them sit as judges of His own miracles. “Why, I am so far,” He says, “from striving either with Moses or with the priests, that I guide the objects of my favor to submit themselves unto them.”
But what is, “for a testimony unto them”? For reproof, for demonstration, for accusation, if they be unthankful. For since they said, as a deceiver and impostor we persecute Him, as an adversary of God, and a transgressor of the law; “You shall bear me witness,” says He, “at that time, that I am not a transgressor of the law. Nay, for having healed you, I remit you to the law, and to the approval of the priests;” which was the act of one honoring the law, and admiring Moses, and not setting himself in opposition to the ancient doctrines.
And if they were not in fact to be the better, hereby most of all one may perceive His respect for the law, that although He foreknew they would reap no benefit, He fulfilled all His part. For this very thing He did indeed foreknow, and foretold it: not saying, “for their correction,” neither, “for their instruction,” but, “for a testimony unto them,” that is, for accusation, and for reproof, and for a witness that all has been done on my part; and though I foreknew they would continue incorrigible, not even so did I omit what ought to be done; only they continued keeping up to the end their own wickedness.
This, we may observe, He says elsewhere also; “This gospel shall be preached in all the world for a testimony to all the nations, and then shall the end come;” to the nations, to them that obey not, to them that believe not. Thus, lest any one should say, “And wherefore preach to all, if all are not to believe?”— it is that I may be found to have done all my own part, and that no man may hereafter be able to find fault, as though he had not heard. For the very preaching shall bear witness against them, and they will not be able hereafter to say, “We heard not;” for the word of godliness “has gone out unto the ends of the world.”
4. Therefore bearing these things in mind, let us also fulfill all our duties to our neighbor, and to God let us give thanks continually. For it is too monstrous, enjoying as we do His bounty in deed every day, not so much as in word to acknowledge the favor; and this, though the acknowledgment again yield all its profit to us. Since He needs not, be sure, anything of ours: but we stand in need of all things from Him. Thus thanksgiving itself adds nothing to Him, but causes us to be nearer to Him. For if men's bounties, when we call them to memory, do the more warm us with their proper love-charm; much more when we are continually bringing to mind the noble acts of our Lord towards us, shall we be more diligent in regard of His commandments.
For this cause Paul also said, “Be thankful.” For the best preservative of any benefit is the remembrance of the benefit, and a continual thanksgiving.
For this cause even the awful mysteries, so full of that great salvation, which are celebrated at every communion, are called a sacrifice of thanksgiving, because they are the commemoration of many benefits, and they signify the very sum of God's care for us, and by all means they work upon us to be thankful. For if His being born of a virgin was a great miracle, and the evangelist said in amaze, “now all this was done;” His being also slain, what place shall we find for that? Tell me. I mean, if to be born is called “all this;” to be crucified, and to pour forth His blood, and to give Himself to us for a spiritual feast and banquet—what can that be called? Let us therefore give Him thanks continually, and let this precede both our words and our works.
But let us be thankful not for our own blessings alone, but also for those of others; for in this way we shall be able both to destroy our envy, and to rivet our charity, and make it more genuine. Since it will not even be possible for you to go on envying them, in behalf of whom you give thanks to the Lord.
Wherefore, as you know, the priest also enjoins to give thanks for the world, for the former things, for the things that are now, for what has been done to us before, for what shall befall us hereafter, when that sacrifice is set forth.
For this is the thing both to free us from earth, and to remove us into heaven, and to make us angels instead of men. Because they too form a choir, and give thanks to God for His good things bestowed on us, saying, “Glory to God in the highest, and on earth peace, good will towards men.” “And what is this to us, that are not upon earth, nor are men?” “Nay, it is very much to us, for we have been taught so to love our fellow serv ants, as even to account their blessings ours.”
Wherefore Paul also, everywhere in his epistles, gives thanks for God's gracious acts to the world.
Let us too therefore continually give thanks, for our own blessings, and for those of others, alike for the small and for the great. For though the gift be small, it is made great by being God's gift, or rather, there is nothing small that comes from Him, not only because it is bestowed by Him, but also in its very nature.
Source: Homilies on the Gospel of St. Matthew (New Advent)