The interpretation timeline
Ephesians 2:1 Douay-Rheims

And you, when you were dead in your offences, and sins,

A.D. 220 – 1849 7 witnesses 8 excerpts

Patristic

before A.D. 750
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“I suppose, forsooth, we find Him, when he speaks of such as "were dead in trespasses and sins, wherein they had walked according to the course of this world, according to the prince of the power of the air, who worketh in the children of disobedience." But Marcion must not here interpret the world as meaning the God of the world.”
Source
407
A.D.
John Chrysostom Patristic
A.D. 347–407
“There is, we know, a corporal, and there is also a spiritual, dying. Of the first it is no crime to partake, nor is there any peril in it, inasmuch as there is no blame attached to it, for it is a matter of nature, not of deliberate choice. It had its origin in the transgression of the first-created man, and thenceforward in its issue it passed into a nature, and, at all events, will quickly be brought to a termination; whereas this spiritual dying, being a matter of deliberate choice, has criminality, and has no termination.”
Source
“You observe the gentleness of Paul, and how on all occasions he encourages the hearer, not bearing too hard upon him. For whereas he had said, Ye have arrived at the very last degree of wickedness, (for such is the meaning of becoming dead,) that he may not excessively distress them, (because men are put to shame when their former misdeeds are brought forward, cancelled though they be, and no longer attended with danger,) he gives them, as it were, an accomplice, that it may not be supposed that the work is all their own, and that accomplice a powerful one. And who then is this? The Devil.”
Source

Scholastic

c. 1100 – 1500
1273
A.D.
Thomas Aquinas Catholic
1225–1274
“Above, the Apostle enumerated the benefits shown to the human race in common through Christ; here the Apostle recalls the same benefits by comparison to their past condition. Now their past condition can be considered in two ways. First, as to the condition of guilt; second, as to their condition of gentileness. The Apostle therefore does two things: first he recalls the benefits shown to them as regards the first condition; second he recalls them by comparison to the second condition, at the words for which cause be mindful, etc. The first is again divided into two, because first the Apostle recounts their condition of guilt; second the benefit of the grace of justification, at the words but God, who is rich, etc. The first is again divided into two, because first he recalls the condition of guilt as regards the Gentiles; second as regards the Jews, at the words among whom also we all, etc. The first is again divided into two, because first he sets forth the generality of the benefit; second he adds the necessity of this benefit, at the words when we were dead, etc. He says therefore: I say that God works magnificently in the faithful according to the working of the might of his power, which he wrought in Christ, and this because he raised him from the dead; according to this working, then, in the likeness of this working he has made us alive together, that is, with the life of grace out of the death of sin. Hosea 6:3: he will revive us after two days, on the third day he will raise us up, etc. Colossians 3:1: if you have risen together with Christ, seek the things that are above, etc. He shows the necessity of this benefit when he says when you were dead, etc., where he describes their guilt most excellently. First as to its multitude, because when you were dead, namely with a spiritual death, which is the worst. Psalm 33:22: the death of sinners is the worst. For sin is called death, because through it man is separated from the Lord, who is life. John 14:6: I am the way, the truth, and the life. Dead, I say, in your offenses and sins — behold the multitude. In offenses indeed as to things omitted, Psalm 18:13: who understands offenses, etc.; and in sins as to things committed. In which you once walked — which he says for this reason, that he might magnify the multitude of sins. For some, if for an hour they are dead in sins and in offenses, nevertheless cease at some point and desist from sinning; but these, proceeding and walking from bad to worse, kept advancing. A similar thing is found in Philippians 3:18: for many walk, of whom I have often told you, and now tell you weeping, etc. Jeremiah 2:5: they walked after their vanity, and became vain. Second, he describes their guilt as to its cause, which is set down as twofold. One is on the part of this world, because they were being enticed by the things of the world. And as to this he says according to the age of this world, that is, according to the worldly life of the things of the world, which entice you. 1 John 2:15: if anyone loves the world, the charity of the Father is not in him. For which reason he had said beforehand: love not the world. The other cause is on the part of the demons, whom they served, of whom it is said in Wisdom 14:27: the worship of unspeakable idols is the cause and beginning of every evil. And as to this he says and according to the prince of the power. Now he describes this cause in three ways. First indeed as to the power, saying according to the prince of the power, that is, one exercising power — not that he has this naturally, since he is neither lord nor creator by nature, but insofar as he lords it over men who subject themselves to him by sinning. John 12:31: now the prince of this world shall be cast out. And John 14:30: the prince of this world is coming, and in me he has nothing. Second as to habitation, because of this air, that is, one who has power in this murky air. Here it must be known that concerning these demons there is a twofold opinion among the doctors. For some have said that the demons who fell were not of the highest orders, but of the lower ones, which preside over the lower bodies. Now it is agreed that the whole corporeal creature is administered by God through the ministry of angels. And this is the opinion of John Damascene, namely that the first of those who fell presided over the order of earthly things, which perhaps was taken from a saying of Plato, who posited certain celestial or worldly substances. And according to this, what he says of this air is expounded as meaning: created for this, that they might preside over this air. But others hold, and better, that they were of the highest orders, so that what he says of this air serves to show that this very air is their habitation as their punishment. Whence Jude in his canonical epistle says: but the angels who did not keep their own principality, but abandoned their own dwelling, he has kept in everlasting chains under darkness unto the judgment of the great day. Now the reason why they were not thrust down into hell immediately after their fall, but are left in the air, is that God did not wish that, through their sinning, their creation should be entirely frustrated; and therefore he gave them over to men as a training-ground, whereby they might prepare a crown for the good, but eternal death for the wicked. And because until the day of judgment there is for us a time of war and of meriting, therefore they will remain in the air until then; but after the day of judgment they will be thrust down into hell. It must also be noted that one reading has spirits (spiritus), and thus it is of the genitive case, and the singular is put for the plural, as if to say: of the spirits. Another reading has spirit (spiritum), and then it is of the accusative case, so that it would read: according to the prince spirit, that is, who is prince of spirit. Third as to operation, where he says who now works in the sons of unbelief, that is, in those who repel from themselves the fruit of the passion of Christ, who were sons of unbelief. Or because they have no faith concerning eternal things, nor hope of salvation through Christ: and in such men the prince of the power of this air works freely, leading them where he wills, of whom it is said below, chapter 4:19: who, despairing, have given themselves up to lasciviousness, unto the working of all uncleanness. Or unbelief, that is, of those concerning whom one must be diffident, that is, who sin out of malice, in whom the prince of this world also works at his beck and call. For concerning those who sin out of ignorance and weakness, one is not to despair, nor does that prince work in them at his beck and call. But against this: no one is to be despaired of as long as he lives. I answer. It must be said that concerning anyone there can be a twofold hope: one on the part of man, the other on the part of divine grace. And thus concerning someone one may despair on his own part, of whom nevertheless one must not despair on the part of God — just as it was to be despaired of, on his own part, that Lazarus lying in the tomb would rise again, though it was not to be despaired of on the part of God, by whom he was raised up. Concerning those, then, who out of malice are much sunk down in sins, if their own strength be regarded, one may despair — Psalm 68:3: I am stuck in the mire of the deep, and there is no sure standing — yet not if the divine power be regarded. Concerning these sons of unbelief it is said below, chapter 5:6: let no man deceive you with vain words. For because of these things the wrath of God comes upon the sons of unbelief. Then, when he says among whom we also all, etc., the Apostle recalls the condition of guilt as regards the Jews, showing that they all had been in sin, according to that saying in Romans 3:9: we have charged that Jews and Greeks are all under sin. Yet a difference must be noted here, because the Apostle, treating of the guilt of the Gentiles, assigned two causes of guilt to have existed: one on the part of the world, the other on the part of the demons, whom they worshipped. Because, then, the Jews were like the Gentiles in the condition of guilt as regards the first cause, but not as regards the second, therefore the Apostle makes no mention of their guilt except as regards the cause which is on the part of the world. Concerning this he does three things. First he recalls their guilt as to the sin of the heart; second as to the sin of deed; third as to the sin of origin. Now he intimates the sin of the heart through the desires of the flesh, and as to this he says among whom, namely the sins or offenses, we all, namely the Jews, once had our conversation, leading our life, in the desires of our flesh, that is, of carnal things. Titus 3:3: for we also were sometime foolish and unbelieving, erring and serving divers desires and pleasures, etc. Romans 13:14: make not provision for the flesh in its desires. Now the sin of deed is nothing other than the expression of interior concupiscence. Now there is a certain concupiscence of the flesh, such as the natural concupiscences, for instance that of food, whereby the individual is preserved, and that of venereal things, whereby the species is preserved; and as to this he says doing the will, etc., that is, those things in which the flesh takes delight. Romans 8:8: now they that are in the flesh cannot please God. But there is another, a concupiscence of the cognitive power, namely of those things which do not come from the desires of the flesh, but from the very appetite of the soul, such as ambition for honor and for one's own excellence, and the like; and as to this he says and of the thoughts, that is, carrying out those concupiscences which are caused by the instinct of our thoughts. Now he intimates the sin of origin, saying and we were by nature children of wrath. This sin indeed is transfused from the first parent not only into the Gentiles, but also into the Jews. Romans 5:12: as by one man sin entered into this world, and by sin death; and so death passed upon all men, in whom all have sinned. And just as men are cleansed of original sin through baptism only as regards their own persons, whence they beget sons who must be baptized, so circumcision cleansed from the original only the persons themselves, but they still begot children who had to be circumcised. And this is what he says we were by nature, that is, through the origin of nature — not indeed of nature as nature is, since as such it is good and from God, but of nature as it is vitiated — children of wrath, that is, of vengeance, of punishment, and of Gehenna, and this even as the rest also, that is, the Gentiles.”

Post-Reformation

c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“The miserable condition of the Ephesians by nature is here in part described. Observed, 1. Unregenerate souls are dead in trespasses and sins. All those who are in their sins, are dead in sins; yea, in trespasses and sins, which may signify all sorts of sins, habitual and actual, sins of heart and of life. Sin is the death of the soul. Wherever that prevails there is a privation of all spiritual life. Sinners are dead in state, being destitute of the principles, and powers of spiritual life; and cut off from God, the fountain of life: and they are dead in law, as a condemned malefactor is said to be a dead man. 2. A state of sin is a state of conformity to this world, Eph 2:2. In the first verse he speaks of their internal state, in this of their outward conversation: Wherein, in which trespasses and sins, in time past you walked, you lived and behaved yourselves in such a manner as the men of the world are used to do. 3. We are by nature bond-slaves to sin and Satan. Those who walk in trespasses and sins, and according to the course of this world, walk according to the prince of the power of the air. The devil, or the prince of devils, is thus described. See Mat 12:24, Mat 12:26. The legions of apostate angels are as one power united under one chief; and therefore what is called the powers of darkness elsewhere is here spoken of in the singular number. The air is represented as the seat of his kingdom: and it was the opinion of both Jews and heathens that the air is full of spirits, and that there they exercise and exert themselves. The devil seems to have some power (by God's permission) in the lower region of the air; there he is at hand to tempt men, and to do as much mischief to the world as he can: but it is the comfort and joy of God's people that he who is head over all things to the church has conquered the devil and has him in his chain. But wicked men are slaves to Satan, for they walk according to him; they conform their lives and actions to the will and pleasure of this great usurper. The course and tenour of their lives are according to his suggestions, and in compliance with his temptations; they are subject to him, and are led captive by him at his will, whereupon he is called the god of this world, and the spirit that now worketh in the children of disobedience. The children of disobedience are such as choose to disobey God, and to serve the devil; in these he works very powerfully and effectually. As the good Spirit works that which is good in obedient souls, so this evil spirit works that which is evil in wicked men; and he now works, not only heretofore, but even since the world has been blessed with the light of the glorious gospel. The apostle adds, Among whom also we all had our conversation in times past, which words refer to the Jews, whom he signifies here to have been in the like sad and miserable condition by nature, and to have been as vile and wicked as the unregenerate Gentiles themselves, and whose natural state he further describes in the next words. 4. We are by nature drudges to the flesh, and to our corrupt affections, Eph 2:3. By fulfilling the desires of the flesh and of the mind, men contract that filthiness of flesh and spirit from which the apostle exhorts Christians to cleanse themselves, Co2 7:1. The fulfilling of the desires of the flesh and of the mind includes all the sin and wickedness that are acted in and by both the inferior and the higher or nobler powers of the soul. We lived in the actual commission of all those sins to which corrupt nature inclined us. The carnal mind makes a man a perfect slave to his vicious appetite. - The fulfilling of the wills of the flesh, so the words may be rendered, denoting the efficacy of these lusts, and what power they have over those who yield themselves up unto them. 5. We are by nature the children of wrath, even as others. The Jews were so, as well as the Gentiles; and one man is as much so as another by nature, not only by custom and imitation, but from the time when we began to exist, and by reason of our natural inclinations and appetites. All men, being naturally children of disobedience, are also by nature children of wrath: God is angry with the wicked every day. Our state and course are such as deserve wrath, and would end in eternal wrath, if divine grace did not interpose. What reason have sinners then to be looking out for that grace that will make them, of children of wrath, children of God and heirs of glory! Thus far the apostle has described the misery of a natural state in these verses, which we shall find him pursuing again in some following ones.”
Source
1771
A.D.
John Gill Reformed
1697–1771
“And you hath he quickened,.... The design of the apostle in this and some following verses, is to show the exceeding sinfulness of sin, and to set forth the sad estate and condition of man by nature, and to magnify the riches of the grace of God, and represent the exceeding greatness of his power in conversion: the phrase hath he quickened, is not in the original text, but is supplied from Eph 2:5, where it will be met with and explained: here those who are quickened with Christ, and by the power and grace of God, are described in their natural and unregenerate estate, who were dead in trespasses and sins; not only dead in Adam, in whom they sinned, being their federal head and representative; and in a legal sense, the sentence of condemnation and death having passed upon them; but in a moral sense, through original sin, and their own actual transgressions: which death lies in a separation from God, Father, Son, and Spirit, such are without God, and are alienated from the life of God, and they are without Christ, who is the author and giver of life, and they are sensual, not having the Spirit, who is the spirit of life; and in a deformation of the image of God, such are dead as to their understandings, wills, and affections, with respect to spiritual things, and as to their capacity to do any thing that is spiritually good; and in a loss of original righteousness; and in a privation of the sense of sin and misery; and in a servitude to sin, Satan, and the world: hence it appears, that man must be in himself unacceptable to God, infectious and hurtful to his fellow creatures, and incapable of helping himself: so it was usual with the Jews to call a wicked and ignorant man, a dead man; they say (i), "there is no death like that of those that transgress the words of the law, who are called, "dead men", and therefore the Scripture says, "turn and live".'' And again (k), "no man is called a living man, but he who is in the way of truth in this world.----And a wicked man who does not go in the way of truth, is called, "a dead man".'' And once more (l). "whoever is without wisdom, lo, he is "as a dead man";'' See Gill on Ti1 5:6. The Alexandrian and Claromontane copies, and one of Stephens's, and the Vulgate Latin version, read, "dead in your trespasses and sins"; and the Syriac version, "dead in your sins and in your trespasses"; and the Ethiopic version only, "dead in your sins". (i) Zohar in Gen, fol. 41. 3. (k) Ib. in Num. fol. 76. 1. Vid. ib;. in Exod. fol. 44. 2. (l) Caphtor, fol. 30. 2.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“And you hath he quickened - This chapter should not have been separated from the preceding, with which it is most intimately connected. As Christ fills the whole body of Christian believers with his fullness, (Eph 1:23), so had he dealt with the converted Ephesians, who before were dead in trespasses, and dead in sins. Death is often used by all writers, and in all nations, to express a state of extreme misery. The Ephesians, by trespassing and sinning, had brought themselves into a state of deplorable wretchedness, as had all the heathen nations; and having thus sinned against God, they were condemned by him, and might be considered as dead in law - incapable of performing any legal act, and always liable to the punishment of death, which they had deserved, and which was ready to be inflicted upon them. Trespasses, παραπτωμασι, may signify the slightest deviation from the line and rule of moral equity, as well as any flagrant offense; for these are equally transgressions, as long as the sacred line that separates between vice and virtue is passed over. Sins, ἁμαρτιαις, may probably mean here habitual transgression; sinning knowingly and daringly.”
Source
1849
A.D.
1774–1849
“He enlivened you, when you were dead. These words, he enlivened or restored to life, are necessary to express the literal sense and construction, as appears from the following fifth verse. by what is here translated offences, are commonly understood trespasses less grievous than by the word sins. (Witham) — God hath quickened you, or restored you to life; these words, expressed in ver. 5, are understood in this: in some editions they are expressed. (Bible de Vence)”
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.