The interpretation timeline
Ephesians 2:5 Douay-Rheims

Even when we were dead in sins, hath quickened us together in Christ, (by whose grace you are saved,)

A.D. 215 – 1871 7 witnesses

Patristic

before A.D. 750
215
A.D.
c. A.D. 150–215
“They say that the Saviour himself said "I came to destroy the works of the female," meaning by "female" desire, and by "works" birth and corruption. What then would they say? Has this destruction in fact been accomplished? They could not say so, for the world continues exactly as before. Yet the Lord did not lie. For in truth he did destroy the works of desire, love of money, contentiousness, vanity, mad lust for women, paederasty, gluttony, licentiousness, and similar vices. Their birth is the soul's corruption, since then we are "dead in sins." And this is the incontinence referred to as "female." Birth and the corruption chiefly involved in the creation must necessarily continue until the achievement of complete separation and the restoration of the elect, on whose account even the beings mingled with this world are restored to their proper condition.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“"Even when we were dead through our trespasses He quickened us together with Christ." Again is Christ introduced, and it is a matter well worthy of our belief, because if the Firstfruits live, so do we also. He hath quickened both Him, and us. Seest thou that all this is said of Christ incarnate? Beholdest thou "the exceeding greatness of His power to us-ward who believe?" Them that were dead, them that were children of wrath, them hath he quickened. Beholdest thou "the hope of his calling?"”
Source

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“After the Apostle has amplified the state of the fault that infects, here he commends the benefit of justifying grace. Concerning this he does two things. First he sets down the benefit itself; second he explains himself, at the place "for by grace you are," etc. Now he describes that benefit with respect to three causes. First with respect to the efficient cause; second with respect to the formal, or exemplary, cause; third with respect to the final cause. Now the efficient cause of the divine justifying benefit is the charity of God. And with respect to this he says: "But God, who is rich in mercy, because of his exceeding great charity." Now he says "because of his exceeding great charity," because we can consider a fourfold goodness and efficacy of the divine love. First, because he brought us into being. Wisdom 11:25: "For you love all things that are, and hate none of the things which you have made," etc. Second, because he made us to his own image, and capable of his beatitude. Deuteronomy 33:2-3: "With him are thousands of saints, in his right hand a fiery law; he has loved the peoples, all the saints are in his hand." Third, because he repaired men corrupted through sin. Jeremiah 31:3: "I have loved you with an everlasting charity, and therefore," etc. Fourth, because for our salvation he gave his own Son. John 3:16: "So God loved the world, that he gave his only-begotten Son." Whence Gregory: "O inestimable love of charity! That you might redeem a slave, you handed over your Son." Now he says "who is rich in mercy," because when the love of man is caused by the goodness of the one who is loved, then that man who loves, loves out of justice, inasmuch as it is just that he should love such a one. But when love causes goodness in the beloved, then it is a love proceeding from mercy. Now the love with which God loves us causes goodness in us, and therefore mercy is set down here as, so to speak, the root of divine love. Isaiah 63:7: "He has dealt bountifully with them according to his indulgence, and according to the multitude of his mercies." In the same place: "The multitude of your tender mercies and of your compassions is upon me." Now God is said to be rich in mercy, because he has it infinite and unfailing, which man does not have. For in three things man shows mercy with a limit and a limitation. First indeed in bestowing temporal benefits, and this mercy is finite, not exceeding the limits of one's own capacity. Tobit 4:8: "As you are able, so be merciful"; but God is rich also towards all who call upon him, as is said in Romans 10:12. Second, the mercy of man is finite because he forgives only an offense against himself, and in this too there ought to be a measure, namely that he not forgive so indiscriminately that the one whom he forgives becomes more insolent, more prone and more ready to offend again. Ecclesiastes 8:11: "For because sentence is not speedily pronounced against the evil, the children of men commit evils without any fear." But nothing can harm God, and therefore he can forgive every offense. Job 35:6: "If you sin, what will you harm him?" And a little after: "Moreover if you act justly, what will you give him?" Third, man shows mercy by remitting punishment, and in this too a measure must be kept, namely that you not act against the justice of a higher law; but God can remit the punishment of all, since he is bound by no law of a superior. Job 34:13: "Whom has he appointed over the earth? Or whom has he set over the world which he made?" Thus therefore the mercy of God is infinite, because it is not constrained by the narrowness of riches, nor restricted by fear of harm, nor by the law of a superior. Now the exemplary cause of the benefit is that it was conferred in Christ. And with respect to this he says: "when we were dead in sins, he brought us to life together in Christ," etc. Here he touches on a threefold benefit, namely: of justification, of resurrection from the dead, and of ascension into heaven, through which three we are made like to Christ. He says therefore with respect to the first — so that the text be read as suspended — "But God, who is rich," etc., "when we were dead in sins, he brought us to life together in Christ," that is, he made us live together with Christ. Hosea 6:3: "He will bring us to life after two days," etc. "He brought to life together," I say, here namely by way of justice. Psalm 65:9: "Who has set my soul to live." And this "in Christ," that is, through the grace of Christ, by whose grace, namely Christ's, you are saved. Romans 8:24: "For we are saved by hope." But with respect to the second he says: "and he raised us up together with Christ," with respect to the soul in reality, and with respect to the body in hope. Romans 8:11: "He who raised him up from the dead will also bring to life our mortal bodies," etc. But with respect to the third he says: "and made us sit together in the heavenly places in Christ Jesus," namely now through hope, and finally in the future in reality, because, as is said in John 12:26: "Where I am, there also shall my minister be," etc. Likewise Apocalypse 3:21: "He who shall overcome, I will give him to sit with me on my throne, as I also have overcome, and have sat with my Father on his throne." Now the Apostle in these things uses the past tense for the future, declaring as though already done what is future, because of the certainty of hope. Thus therefore he brought to life together with respect to the soul, finally raised up with respect to the body, made to sit together with respect to both. Consequently, when he says "that he might show," etc., he shows the final cause of the benefit conferred. This indeed can be read in two ways, because "the ages to come" can be taken either in this life, or in the life to come. For if they are taken in this life, then "age" is a certain measure of time and the period of one generation, so that it may be said thus: I say that us, who are the firstfruits of those who sleep, he brought to life together in Christ, and this that he might show, in the ages to come — that is, to those who are to be after us — the abundant riches of his grace, and this not by our merits, but by his own goodness, which is, namely, upon us in Christ Jesus, that is, through Christ Jesus. 1 Timothy 1:15f: "Jesus Christ came into this world to save sinners, of whom I am the first. But for this reason I obtained mercy, that in me Christ might show all patience, for the instruction of those who are to believe in him unto eternal life." Thus therefore God bestowed abundant gifts of grace on the first saints, so that those who came after might more easily be converted to Christ. Or "age" can be taken otherwise, namely in the other life, of which it is said in Ecclesiasticus 24:14: "and even to the age to come I shall not cease." But although there is one age there, because there is eternity there, he nevertheless says "in the ages to come," on account of the multitude of the saints participating in eternity: so that there may be said to be as many ages there as there are participated eternities. Of these ages it is said in Psalm 144:13: "Your kingdom is a kingdom of all ages." He says therefore according to this sense: I say that he brought us to life in hope, namely through Christ, or in grace, that he might show, in the ages to come — that is, might fulfill in the other life — the abundant riches of his grace, that is, the abundant grace which even in this world, while he forgives many sins and grants the greatest gifts, he speaks of: which indeed superabounds in the other life, because there it is possessed without failing. John 10:10: "I have come that they may have life," namely of grace, "in this world, and have it more abundantly," namely of glory in the fatherland. And this "in his goodness." Psalm 72:1: "How good is God to Israel." Lamentations 3:25: "The Lord is good to them that hope in him, to the soul that seeks him." And this "above us," that is, above our desire, above our understanding, and above our capacity. Isaiah 64:4: "The eye has seen us, O God, besides you, the things which you have prepared for them that wait for you." And this "in Christ Jesus," that is, through Christ Jesus, because just as grace is conferred on us through Christ, so also is glory consummated. Psalm 83:12: "The Lord will give grace and glory." For through him we are made blessed, through whom we are justified. Now he says "that he might show," because the treasure of grace is hidden in us, because we have it in earthen vessels, as is said in 2 Corinthians 4:7; and 1 John 3:1: "Behold what manner of charity the Father has given us, that we should be called and should be the sons of God." And a little after: "Now we are the sons of God, and it has not yet appeared," etc. But that hidden treasure, because it has not yet appeared, will be shown in the ages to come, because in the fatherland all things will be open to us that pertain to the manifest glory of the saints. Romans 8:18: "The sufferings of this time are not worthy to be compared to the future glory that shall be revealed in us."”

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“Even when we were dead in sins,.... See Gill on Eph 2:1. Hath quickened us together with Christ: which may be understood either of regeneration, when a soul that is dead in a moral or spiritual sense, is quickened and made alive; a principle of life is infused, and acts of life are put forth; such have their spiritual senses, and these in exercise; they can feel the load and weight of sin; see their lost state and condition, the odiousness of sin, and the beauty of a Saviour, the insufficiency of their own righteousness, and the fulness and suitableness of Christ's; breathe after divine and spiritual things; speak in prayer to God, and the language of Canaan to fellow Christians; move towards Christ, exercise grace on him, act for him, and walk on in him: and this life they have not from themselves, for previous to it they are dead, and in this quickening work are entirely passive; nor can regenerate persons quicken themselves, when in dead and lifeless frames, and much less unregenerate sinners; but this is God's act, the act of God the Father; though not exclusive of the Son, who quickens whom he will; nor of the Spirit, who is the Spirit of life from Christ; and it is an instance of the exceeding greatness, both of his power and love; and this may be said to be done with Christ, because he is the procuring and meritorious cause of it, by his death and resurrection from the dead; and is the author and efficient cause of it; and he is the matter of it, it is not so much the quickened persons that live, as Christ that lives in them, and it is the same life he himself lives; and because he lives, they shall live also; it is in him as in the fountain, and in them as in the stream: or else this may be understood of justification; men are dead in a legal sense, and on account of sin, are under the sentence of death; though they naturally think themselves alive, and in a good state; but when the Spirit of God comes, he strikes dead all their hopes of life by a covenant of works; not merely by letting in the terrors of the law upon the conscience, but by showing the spirituality of it, and the exceeding sinfulness of sin; and how incapable they are of satisfying the law, for the transgressions of it; and then he works faith in them, whereby they revive and live; they see pardon and righteousness in Christ, and pray for the one, and plead the other; and also lay hold and live upon the righteousness of Christ, when the Spirit seals up the pardon of their sins to them, and passes the sentence of justification on them, and so they reckon themselves alive unto God; and this is the justification of life, the Scripture speaks of; and this is in consequence of their being quickened with Christ, at the time of his resurrection; for when he rose from the dead, they rose with him; when he was justified, they were justified in him; and in this sense when he was quickened, they were quickened with him: by grace ye are saved: the Claromontane copy and the Vulgate Latin version read, "by whose grace"; and the Arabic and Ethiopic versions, "by his grace"; either by the grace of him that quickens, or by the grace of Christ with whom they were quickened; the Syriac version renders it, "by his grace he hath redeemed us"; which seems to refer to the redeeming grace of Christ; and so the Ethiopic version, "and hath delivered us by his grace"; and there is a change of the person into "us", which seems more agreeable to what goes before, and follows after; See Gill on Eph 2:8.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Even when we were dead in sins - Dead in our souls; dead towards God; dead in law; and exposed to death eternal, Hath quickened us together with Christ - God has given us as complete a resurrection from the death of sin to a life of righteousness, as the body of Christ has had from the grave. And as this quickening, or making alive, was most gratuitous on God's part, the apostle, with great propriety, says; By grace ye are saved.”
Source
1849
A.D.
1774–1849
“Quickened us together in Christ. Faith, baptism, and grace, are pledges of our future resurrection and glorification in heaven. Our present conversion is also a kind of resurrection. The time is come, when the dead shall hear the voice of the Son of God, and those who hear shall live. (St. Augustine upon St. John, No. 7.)”
Source
1871
A.D.
1871
“dead in sins--The best reading is in the Greek, "dead in our (literally, 'the') trespasses." quickened--"vivified" spiritually, and consequences hereafter, corporally. There must be a spiritual resurrection of the soul before there can be a comfortable resurrection of the body [PEARSON] (Joh 11:25-26; Rom 8:11). together with Christ--The Head being seated at God's right hand, the body also sits there with Him [CHRYSOSTOM]. We are already seated there IN Him ("in Christ Jesus," Eph 2:6), and hereafter shall be seated by Him; IN Him already as in our Head, which is the ground of our hope; by Him hereafter, as by the conferring cause, when hope shall be swallowed up in fruition [PEARSON]. What God wrought in Christ, He wrought (by the very fact) in all united to Christ, and one with Him. by grace ye are saved--Greek, "Ye are in a saved state." Not merely "ye are being saved," but ye "are passed from death unto life" (Joh 5:24). Salvation is to the Christian not a thing to be waited for hereafter, but already realized (Jo1 3:14). The parenthetic introduction of this clause here (compare Eph 2:8) is a burst of Paul's feeling, and in order to make the Ephesians feel that grace from first to last is the sole source of salvation; hence, too, he says "ye," not "we."”
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.