The interpretation timeline
Titus 2:14 Douay-Rheims

Who gave himself for us, that he might redeem us from all iniquity, and might cleanse to himself a people acceptable, a pursuer of good works.

A.D. 99 – 1871 10 witnesses 11 excerpts

Patristic

before A.D. 750
99
A.D.
Clement of Rome Patristic
d. A.D. 99
“May God, who sees all things, and who is the Ruler of all spirits and the Lord of all flesh — who chose our Lord Jesus Christ and us through Him to be a peculiar [Titus 2:14] people — grant to every soul that calls upon His glorious and holy name, faith, fear, peace, patience, long-suffering, self-control, purity, and sobriety, to the well-pleasing of His name, through our High Priest and Protector, Jesus Christ, by whom be to Him glory, and majesty, and power, and honour, both now and for evermore.”
Source
108
A.D.
c. A.D. 50–107
“For there is one flesh of the Lord Jesus Christ; and His blood which was shed for us is one; one loaf also is broken to all [the communicants], and one cup is distributed among them all: there is but one altar for the whole Church, and one bishop, with the presbytery and deacons, my fellow-servants. Since, also, there is but one unbegotten Being, God, even the Father; and one only-begotten Son, God, the Word and man; and one Comforter, the Spirit of truth; and also one preaching, and one faith, and one baptism; and one Church which the holy apostles established from one end of the earth to the other by the blood of Christ, and by their own sweat and toil; it behoves you also, therefore, as "a peculiar people, and a holy nation," to perform all things with harmony in Christ.”
Source
215
A.D.
c. A.D. 150–215
“For it follows that there is one unchangeable gift of salvation given by one God, through one Lord, benefiting in many ways. For which cause the middle wall which separated the Greek from the Jew is taken away, in order that there might be a peculiar people. And so both meet in the one unity of faith; and the selection out of both is one.”
Source
373
A.D.
c. A.D. 296–373
“How could he have given himself if he had not worn flesh? He offered his flesh and gave himself for us, in order that undergoing death in it, "He might bring to nothing the one who held the power of death, that is, the devil." For this reason we continually give thanks in the name of Jesus Christ. We do not bring to nothing the grace which came to us through him. For the coming of the Savior in the flesh has been the ransom and salvation of all creation.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"That he might purify unto himself a people of his own." Considering the desperate condition of human nature and the ineffably tender solicitude of Christ, in what he delivered us from and what he freely gave us, and kindled by the yearning of affection towards him, this is a remarkably tender expression. Thus the prophets often appropriate to themselves him who is God of all, as in the words, "O God, you are my God, early will I seek you." Moreover, this language teaches that each individual justly owes a great debt of gratitude to Christ, as if he had come for that person's sake alone. For he would not have grudged this his condescension even if it were only for one person. The measure of his love to each is as great as to the whole world.”
Source
“Ver. 14. "Who gave Himself for us, that He might redeem us from all iniquity, and purify unto Himself a peculiar people." "Peculiar": that is, selected from the rest, and having nothing in common with them. "Zealous of good works." Dost thou see that our part is necessary, not merely works, but "zealous"; we should with all alacrity, with a becoming earnestness, go forward in virtue. For when we were weighed down with evils, and incurably diseased, it was of His lovingkindness that we were delivered. But what follows after this is our part as well as His.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“The faithful who are holy and good may be few in comparison with the larger number of the wicked, but … "many shall come from the east and the west and shall sit down with Abraham and Isaac and Jacob in the kingdom of heaven." God shows to himself "a numerous people, zealous for good works." … Even when sometimes darkened and, as it were, clouded over by a great number of scandals … still this people shines forth in her strongest members.”
Source

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“Above, the Apostle instructed Titus how he should teach slaves and free men, and he concluded, as it were, with a reason, namely that the doctrine of Christ might be adorned; here, assigning the full reason for what was said, he explains what he said by way of good conduct. And first he sets forth the grace and teaching of Christ; second he leads him to the preaching of grace, at the place "these things speak." Again, first he sets forth the appearing of grace; second its instruction, at "instructing us"; third its operation, at "who gave." Now it must be known that grace implies mercy, because grace concerns that which is given freely, and what is given as a grace is given mercifully. But mercy was always in God, yet formerly it lay hidden with regard to men. Ps. 35:6: "Lord, your mercy is in heaven." For before Christ, all, however just they were, were under condemnation, but when Christ the Son of God assumed flesh, grace appeared. 1 Tim. 3:16: "And manifestly great is the mystery of piety, which was manifested in the flesh." Ps. 79:2: "You who sit upon the Cherubim, show yourself." But the more powerful someone is, the more his grace is desired. Hence the grace of God is to be desired; and this is what he says: "the grace of God." And this for the sake of saving, hence he says "and of our Savior." Is. 51:8: "But my salvation shall be forever." But this grace is not set forth to one people only, the Jews, as formerly, but to all men. Is. 40:5: "All flesh shall see together that the mouth of the Lord has spoken." Is. 52:10: "And all the ends of the earth shall see the salvation of our God." 1 Tim. 2:4: "He wills all men to be saved." And it can be said that at the nativity of Christ this grace appeared in two ways. In one way, and first, because through the greatest grace of God he was given to us. Hence, although his conception is the operation of the whole Trinity, it is nevertheless attributed especially to the Holy Spirit, who is the principle of graces. And this grace appeared to all men, and especially to the man Christ. Jn. 1:14: "full of grace and truth." From this grace, secondly, the instruction of the human race followed; because before Christ the world was in ignorance and heresy. Is. 9:2: "The people who walked in darkness have seen a great light." Hence he says "instructing us," namely as a man instructs a son. Now he has instructed us concerning two things, because two things are necessary for man, namely good work and right intention. First he shows how Christ instructed us concerning the first; second, concerning the second, at "awaiting." He says therefore: "that denying ungodliness and worldly desires." It should be noted that he says "ungodliness and worldly desires," because all sins either consist in those things which are directly against God, which are called sins of ungodliness. For piety, properly speaking, is that according to which we honor our parents and our fatherland. But because God is our principal father, therefore piety pertains to the worship of God. Job 28:28, according to another text, where we have it thus: "behold, the fear of the Lord, that is wisdom," it is found: "behold, piety, that is wisdom." And therefore sins against God are said to be ungodliness. Rom. 1:18: "For the wrath of God is revealed from heaven upon all ungodliness," and there he speaks of idolatry. Or they consist in the abuse of temporal things, and these are worldly desires. Now the saeculum is a space measuring the period of things. Hence by "worldly things" are understood worldly things, and all sins which are committed against one's neighbor, or against oneself, through the abuse of these. Then, when he says "soberly," etc., he shows what good we should do. And he says "soberly" with respect to oneself; "justly," with respect to one's neighbor; "piously" with respect to God. "Soberly" with respect to oneself, as it were measuredly; for bria is a measure, and this is when a man uses external things and his own passions with the measure of reason. Hence sobriety is taken for any measured use of external things and of extrinsic passions. Wis. 8:7: "For she teaches sobriety and wisdom and justice and virtue, than which nothing is more useful in life for men." "Justly" with respect to one's neighbor. Ps. 10:8: "The Lord is just and has loved justice." "Piously" with respect to God. 1 Tim. 4:7: "Exercise yourself unto piety." Then, when he says "awaiting the blessed hope," he instructs him concerning the end, which consists in two things, namely in the glory of the soul at death; the other in the glory of the body, at the coming of Christ. Jn. 5:28: "The hour comes in which all who are in the tombs shall hear the voice of the Son of God," et cetera. As to the first he says "awaiting the blessed hope," against those who place the end of man in the act of the virtues in this life. But this is not true, because even if we live soberly and piously and justly, we are still awaiting. Job 7:1 and 14:6: "as a hireling are his days." Is. 30:18: "blessed are all who wait for him." And therefore he says "awaiting the blessed hope." Which can be understood in two ways: either because it is a hope concerning beatitude; or because the awaiting itself makes them blessed. As to the second he says "and the coming of the glory of the great God, and of our Savior Jesus Christ," namely through whom our bodies will rise again. For he who loves a friend awaits him with desire. 2 Tim. 4:8: "and not only to me, but also to those who love his coming." Lk. 12:36: "you like men awaiting their lord." And he says "coming of glory," because the first coming was one of humility. Phil. 2:8: "he humbled himself," et cetera. Mt. 11:29: "learn from me, because I am meek and humble of heart." And that one will be of glory, because his divinity will become known to all. Lk. 21:27: "and then they shall see the Son of Man coming in the clouds with great power and majesty." And he says "of the great God," against Arius, who said the Son was not equal to the Father. And rightly "great," because it is said in Rom. 9:5: "who is above all, God blessed forever." 1 Jn., last chapter: "that we may be in his true Son," et cetera. Again, he is Savior. 1 Tim. 2:3: "For this is good and acceptable before God our Savior, who wills all men to be saved," et cetera. Because he came for this, and this his name signifies. Mt. 1:21: "for he shall save his people from their sins." And he adds "Christ," namely he who is anointed, in which is understood the union of divinity to humanity. For some are said to be united; but not in such a way that they have the essence of divinity united to them, but because they participate in something of it; but to Christ divinity is united. Ps. 44:8: "God, your God, has anointed you," et cetera. Then, when he says "who gave himself," the operation of grace is shown. And first he shows the benefit of the grace of his passion; second the fruit of the passion, at "that he might redeem us." He says therefore: I say that he is our Savior, and how? Because "he gave himself for us." Eph. 5:2: "walk in love, as Christ also loved us, and delivered himself up for us, an offering and a sacrifice to God." Its fruit is called liberation and sanctification. Liberation, when he says "that he might redeem us from all iniquity." Jn. 8:34: "whoever commits sin is a slave of sin." For the first man, through his own sin, was brought into the slavery of sin, from which slavery he was inclined to another sin; but Christ made satisfaction through his passion; and therefore we are redeemed from slavery. Is. 43:1: "do not fear, for I have redeemed you," et cetera. And not only from the original, but from all which one has added by one's own will. Sanctification is set down as a good, when he says "that he might cleanse for himself a people," that is, that he might sanctify a people, namely so that we might be his people, that is, consecrated to him. 1 Pet. 2:10: "who once were not his people, but now are his people." "Acceptable," namely to God through right faith and intention. Prov. 14:35: "an understanding servant is acceptable to the king." Or "acceptable," that is, peculiar. Deut. 7:6: "the Lord your God has chosen you that you may be to him a peculiar people." But it is also necessary that there be good works outwardly, hence he says "a follower of good works." Rom. 13:3: "do good, and you will have praise from it." Gal. 6:9: "and let us not fail in doing good." Then, when he says "these things speak," etc., he leads him to the preaching of grace, and concerning this he does two things; for first he exhorts him to preach; second he instructs him in the manner of preaching, at "with all," et cetera. He says therefore: speak the things that pertain to what is to be believed, exhort to the things that are to be done. 1 Thess. 2:3: "our exhortation was not from error, nor from uncleanness, nor in deceit." Rebuke those who do evil. 1 Tim. 5:20: "rebuke those who sin before all." And this "with all authority," that is, with authority, because he speaks as an instrument, or minister, of God. And therefore with confidence in the divine authority. Yet in exhorting one must sometimes speak with entreaty, considering one's own weakness. Prov. 18:23: "the poor man speaks with entreaties"; and sometimes with command, considering the authority committed to one. 2 Cor., last chapter: "do you seek a proof of him who speaks in me, Christ?" Or with gentleness toward the good, with authority toward the obstinate. But he needed to be admonished also that he should rebuke with authority, because he was naturally meek. 1 Tim. 4:12: "let no one despise your youth."”

Post-Reformation

c. 1650 – 1900
1832
A.D.
Adam Clarke Methodist
1762–1832
“Who gave himself for us - Who gave his own life as a ransom price to redeem ours. This is evidently what is meant, as the words λυτρωσηται and λαον περιουσιον imply. The verb λυτροω signifies to redeem or ransom by paying a price, as I have often had occasion to observe; and περιουσιος signifies such a peculiar property as a man has in what he has purchased with his own money. Jesus gave his life for the world, and thus has purchased men unto himself; and, having purchased the slaves from their thraldom, he is represented as stripping them of their sordid vestments, cleansing and purifying them unto himself that they may become his own servants, and bringing them out of their dishonorable and oppressive servitude, in which they had no proper motive to diligence and could have no affection for the despot under whose authority they were employed. Thus redeemed, they now become his willing servants, and are zealous of good works - affectionately attached to that noble employment which is assigned to them by that Master whom it is an inexpressible honor to serve. This seems to be the allusion in the above verse.”
Source
1849
A.D.
1774–1849
“A people, particularly acceptable. [6] St. Jerome translates an egregious or eminent people. He says in the Septuagint it corresponds to segula, which signifies a man’s proper possessions, which he has purchased or chosen for himself. Budeus says it signifies what is rare and uncommon; and it is well translated by the Protestants, a particular people. (Witham)”
Source
1871
A.D.
1871
“gave himself--"The forcible 'Himself, His whole self, the greatest gift ever given,' must not be overlooked." for us--Greek, "in our behalf." redeem us--deliver us from bondage by paying the price of His precious blood. An appropriate image in addressing bond-servants (Tit 2:9-10): from all iniquity--the essence of sin, namely, "transgression of the law": in bondage to which we were till then. The aim of His redemption was to redeem us, not merely from the penalty, but from the being of all iniquity. Thus he reverts to the "teaching" in righteousness, or disciplining effect of the grace of God that bringeth salvation (Tit 2:11-12). peculiar--peculiarly His own, as Israel was of old. zealous--in doing and promoting "good works."”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.