First Reading — Isaiah 1:10, 16-20
Clement of Rome
On 1:16–20
The ministers of the grace of God have, by the Holy Spirit, spoken of repentance; and the Lord of all things has himself declared with an oath regarding it, "As I live, says the Lord, I desire not the death of the sinner, but rather his repentance;" [Ezekiel 33:11] adding, moreover, this gracious declaration, "Repent, O house of Israel, of your iniquity." [Ezekiel 18:30] Say to the children of my people, Though your sins reach from earth to heaven, and though they be redder than scarlet, and blacker than sack-cloth, yet if you turn to me with your whole heart, and say, Father! I will listen to you, as to a holy people. [2 Chronicles 7:14] And in another place He speaks thus: "Wash you and become clean; put away the wickedness of your souls from before my eyes; cease from your evil ways, and learn to do well; seek out judgment, deliver the oppressed, judge the fatherless, and see that justice is done to the widow; and come, and let us reason together. He declares, Though your sins be like crimson, I will make them white as snow; though they be like scarlet, I will whiten them like wool. And if you be willing and obey me, you shall eat the good of the land; but if you refuse, and will not hearken unto me, the sword shall devour you, for the mouth of the Lord has spoken these things." [Isaiah 1:16-20] Desiring, therefore, that all His beloved should be partakers of repentance, He has, by His almighty will, established [these declarations].
Responsorial Psalm — Psalm 50:8-9, 16bc-17, 21 and 23
Clement of Rome
On 49:14
The Master, brothers, has need of nothing at all. He desires not anything of anyone, save to confess to him.
On 49:23
Let us … earnestly strive to be found in the number of those that wait for him, in order that we may share in his promised gifts. But how, beloved, shall this be done? If our understanding is fixed by faith toward God; if we earnestly seek the things that are pleasing and acceptable to him; if we do the things that are in harmony with his blameless will; and if we follow the way of truth, casting away from us all unrighteousness and iniquity, along with all covetousness, strife, evil practices, deceit, whispering and evil speaking, all hatred of God, pride and haughtiness, vainglory and ambition. For they that do such things are hateful to God; and not only they that do them, but also those that take pleasure in them that do them.
Gospel — Matthew 23:1-12
Origen
On 23:1
The disciples of Christ are better than the common herd; and you may find in the Church such as with more ardent affection come to the word of God; these are Christ’s disciples, the rest are only His people. And sometimes He speaks to His disciples alone, sometimes to the multitudes and His disciples together, as here. The Scribes and Pharisees sit in Moses’ seat, as professing his Law, and boasting that they can interpret it. Those that do not depart from the letter of the Law are the Scribes; those who make high professions, and separate themselves from the vulgar as better than they, are called Pharisees, which signifies ‘separate.’ Those who understand and expound Moses according to his spiritual meaning, these sit indeed on Moses’ seat, but are neither Scribes nor Pharisees, but better than either, Christ’s beloved disciples. Since His coming these have sat upon the seat of the Church, which is the seat of Christ.
On 23:1
But if the Scribes and Pharisees who sit in Moses’ seat are the teachers of the Jews, teaching the commandments of the Law according to the letter, how is this that the Lord bids us do after all things which they say; but the Apostles in the Acts forbid the believers to do according to the letter of the Law. (Acts 15:19.) These indeed taught after the letter, not understanding the Law spiritually. Whatsoever they say to us out of the Law, with understanding of its sense, that we do and keep, not doing after their works, for they do not what the law enjoins, nor perceive the veil that is upon the letter of the Law. Or by all we are not to understand every thing in the Law, many things for example relating to the sacrifices, and the like, but such as concern our conduct. But why did He command this not of the Law of grace, but of the doctrine of Moses? Because truly it was not the time to publish the commandments of the New Law before the season of His passion. I think also that He had herein something further in view. He was about to bring many things against the Scribes and Pharisees in His discourse following, wherefore that vain men might not think that He coveted their place of authority, or spoke thus out of enmity to them, he first puts away from Himself this suspicion, and then begins to reprove them, that the people might not fall into their faults; and that, because they ought to hear them, they should not think that therefore they ought to imitate them in their works, He adds, But do ye not after their works. What can be more pitiable than such a teacher, whose life to imitate is ruin, to refuse to follow is salvation for his disciples?
On 23:5
And their works likewise they do to be seen of men, using outward circumcision, taking away actual leaven out of their houses, and doing such like things. But Christ’s disciples fulfil the Law in things secret, being Jews inwardly, as the Apostle speaks. (Rom. 2:29.)
On 23:5
Or otherwise; And if one minister the divine word, knowing that it is Christ that makes it to be fruitful, such a one professes himself a minister and not a master; whence it follows, He that is greatest among you, let him be your servant. As Christ Himself, who was in truth our Master, professed Himself a minister, saying, I am in the midst of you as one that ministers. (Luke 22:27.) And well does He conclude this prohibition of all vain-glory with the words, And whosoever shall exalt himself shall be abased; and he that shall humble himself shall be exalted.
On 23:7
And in the Church of Christ are found some who take to themselves the uppermost places, that is, become deacons; next they aspire to the chief seats of those that are called presbyters; and some intrigue to be styled among men Bishop, that is, to be called Rabbi. But Christ’s disciple loves the uppermost place indeed, but at the spiritual banquet, where he may feed on the choicer morsels of spiritual food, for, with the Apostles who sit upon twelve thrones, he loves the chief seats, and hastes by his good works to render himself worthy of such seats; and he also loves salutations made in the heavenly market-place, that is, in the heavenly congregations of the primitive. But the righteous man would be called Rabbi, neither by man, nor by any other, because there is One Master of all men.
On 23:9
But who calls no man father upon earth? He who in every action done as before God, says, Our Father, which art in Heaven.