The interpretation timeline
Genesis 2:17 Douay-Rheims

But of the tree of knowledge of good and evil, thou shalt not eat. For in what day soever thou shalt eat of it, thou shalt die the death.

A.D. 45 – 1871 14 witnesses 16 excerpts

Patristic

before A.D. 750
45
A.D.
c. 15 B.C.–A.D. 45
“XXXIII. Accordingly God says, " In the day in which ye eat of it ye shall die the death." And yet, though they have eaten of it, they not only do not die, but they even beget children, and are the causes of life to other beings besides themselves. What, then, are we to say? Surely that death is of two kinds ; the one being the death of the man, the other the peculiar death of the soul — now the death of the man is the separation of his soul from his body, but the death of the soul is the destruction of virtue and the admission of vice ; and consequently God calls that not merely " to die," but " to die the death;" showing that he is speaking not of common death, but of that peculiar and especial death which is the death of the soul, buried in its passions and in all kinds of evil. And we may almost say that one kind of death is opposed to the other kind. For the one is the separation of what was previously existing in combination, namely, of body and soul. But this other death, on the contrary, is a combination of them both, the inferior one, the body, having the predominance, and the superior one, the soul, being made subject to it When, therefore, God says, "to die the death," you must remark that he is speaking of that death which is inflicted as punishment, and not of that which exists by the original ordinance of nature. The natural death is that one by which the soul is separated from the body. But the one which is inflicted as a punishment, is when the soul dies according to the life of virtue, and lives only according to the life of vice. Well, therefore, did Heraclitus say this, following the doctrine of Moses; for he says, " We are living according to the death of those men; and we have died according to their life." As if he had said, Now, when we are alive, we are so though our soul is dead and buried in our body, as if in a tomb. But if it were to die, then our soul would live according to its proper life, being released from the evil and dead body to which it is bound. THE SECOND BOOK OF THE TREATISE ON THE ALLEGORIES OF THE SACKED LAWS, AFTER THE WORK OF THE SIX DAYS OF CREATION.”
Source
220
A.D.
Tertullian Patristic
c. A.D. 150–220
“The law, however, which you find fault with, and wrest into a subject of contention, was imposed on man by Goodness, aiming at his happiness, that he might cleave to God, and so not show himself an abject creature rather than a free one, nor reduce himself to the level of the other animals, his subjects, which were free from God, and exempt from all tedious subjection; but might, as the sole human being, boast that he alone was worthy of receiving laws from God; and as a rational being, capable of intelligence and knowledge, be restrained within the bounds of rational liberty, subject to Him who had subjected all things unto him. To secure the observance of this law, Goodness likewise took counsel by help of this sanction: "In the day that thou eatest thereof, thou shalt surely die." For it was a most benignant act of His thus to point out the issues of transgression, lest ignorance of the danger should encourage a neglect of obedience. Now, since it was given as a reason previous to the imposition of the law, it also amounted to a motive for subsequently observing it, that a penalty was annexed to its transgression; a penalty, indeed, which He who proposed it was still unwilling that it should be incurred. Learn then the goodness of our God amidst these things and up to this point; learn it from His excellent works, from His kindly blessings, from His indulgent bounties, from His gracious providences, from His laws and warnings, so good and merciful.”
Source
373
A.D.
c. A.D. 296–373
“Knowing once more how the will of man could sway to either side, in anticipation God secured the grace given them by a command and by the place where he put them. For he brought them into his own garden and gave them a law so that, if they kept the grace and remained good, they might still keep the life in paradise without sorrow or pain or care, besides having the promise of incorruption in heaven. But if they transgressed and turned back and became evil, they might know that they were incurring that corruption in death that was theirs by nature, no longer to live in paradise but cast out of it from that time forth to die and abide in death and corruption.”
Source
386
A.D.
Cyril of Jerusalem Patristic
A.D. 313–386
“Although to Adam it was said "For the day you eat of it, you must die," today you have been faithful. Today will bring you salvation. The tree brought ruin to Adam; the tree [of life] shall bring you into paradise. Fear not the serpent; he shall not cast you out, for he has fallen from heaven. I say not to you, "This day you shall depart," but "This day you shall be with me."”
Source
389
A.D.
A.D. 329–390
“[God gave Adam] a law as a material for his free will to act on. This law was a commandment as to what plants he might partake of and which one he might not touch. This latter was the tree of knowledge; not, however, because it was evil from the beginning when planted, nor was it forbidden because God grudged it to us—let not the enemies of God wag their tongues in that direction or imitate the serpent. But it would have been good if partaken of at the proper time. The tree was, according to my theory, contemplation, which is safe only for those who have reached maturity of habit to enter upon, but which is not good for those who are still somewhat simple and greedy, just as neither is solid food good for those who are yet tender and have need of milk.”
Source
430
A.D.
Augustine of Hippo Patristic
A.D. 354–430
“Without good reason certain writers are deeply puzzled when they seek to discover how the tree of the knowledge of good and evil could have been so called before man broke God's commandment by touching it and from experience discerning the difference between the good that he lost and the evil that he committed. Now, this tree was given this name so that our first parents might observe the prohibition and not touch it, taking care to avoid suffering the consequences of touching it against the prohibition. It was not because they subsequently went against the commandment and ate the fruit that the tree became the tree of the knowledge of good and evil. Even if they had remained obedient and had taken nothing against that commandment, it would be correctly called by what would happen to them there if they had taken the fruit.”
Source
“God, referring to the forbidden fruit, said to the first man whom he had established in paradise: "In the day that you shall eat of it, you shall die the death." His threat included not only the first part of the first death, that is, the soul's deprivation of God; not only the second part of the first death, that is, the body's deprivation of the soul; not only the whole of the first death in which the soul, separated from both God and the body, is punished; but whatever of death is up to and including that absolutely final and so-called second death … in which the soul, deprived of God but united to the body, suffers eternal punishment.”
Source
523
A.D.
c. A.D. 450–523
“Adam and Eve, so long as they lived in simplicity, and so long as the faith which was in them had not been made gross through corporeal passions, immediately they heard the command of God they received it, and kept it. For God said to Adam, "Thou shalt not eat; and if thou eatest, thou shalt die; but if thou keepest the command I will give thee everlasting life." And by faith Adam received the command, and kept it, and in his simplicity he did not judge the command. Now when the counsel of the Enemy came and found simplicity, it taught craft and cunning, and sowed in that one simple thought, another thought which was its opposite, in order that he who was one man, and was wholly and entirely sincere in his simplicity, might be divided into two thoughts—the willing and the unwilling, the judging and the being judged, and the being in doubt whether he would do the command or not—and the counsel which the Enemy brought to that childlike and simple man made him to be a judge of God's command to him. Now Adam did not prosper in his judgment because it had destroyed his simplicity, for he stupidly thought it meet to listen to an enemy rather than to a friend, and to one who killed rather than to one who could make alive, and to one who taught wickednesses rather than to one who had been to them a teacher of good things. So long as they existed in their simplicity they hearkened unto the voice of God, but as soon as they wished to act cunningly they became receptacles of the counsel of the Calumniator; for cunning is at the side of Satan, and simplicity is with those who belong to Christ.”
Source
“Whosoever feareth God taketh heed not to transgress the boundary of the faith of God, and whosoever believeth in God himself draweth nigh to the fear of God, and the man, in whose soul the fear of God dwelleth, himself becometh a watchful guardian of all the commandments. Adam believed in God, and he was not afraid of God; he believed that He was, and he received from Him the law which He delivered into him. And because he cast out the fear of God from his mind, he forsook the faith, and trod the law under foot. For He that ordained the law involved the commandment with fear: "In the day that thou eatest of the tree, thou shalt die the death." And because Adam had cast out from him that fear, he believed the crafty one instead of God, and trod under foot the law which had been ordained by the Judge. And not only Adam did God surround with fear that it might be a fence for the keeping of His commandments, but in all generations, to all the commandments which He ordained did He unite fear.”
Source
date
unknown
c. A.D. 550
“When God said: In what day thou eatest of the tree, thou shalt surely die, he pronounced him to have become mortal, for we see that he did not die immediately according to the threat, so that it is evident the words hinted this: Immortal though thou art, thou shalt become mortal.”
749
A.D.
John of Damascus Patristic
A.D. 676–749
“For God says, "Of every tree of paradise you shall eat," meaning, I think, by means of all created things you will be drawn up to me, their Creator, and from them reap the one fruit which is myself, who am the true life. Let all things be fruitful life to you, and make participation in me to be the substance of your own existence, for thus you shall be immortal. The tree of knowledge of good and evil is the power of discernment by multidimensional vision. This is the complete knowing of one's own nature. Of itself it manifests the magnificence of the Creator, and it is good for them that are fullgrown and have walked in the contemplation of God—for them that have no fear of changing, because in the course of time they have acquired a certain habit of such contemplation. It is not good, however, for such as are still young and are more greedy in their appetites, who, because of the uncertainty of their perseverance in the true good and because of their not yet being solidly established in their application to the only good, are naturally inclined to be drawn away and distracted by their solicitude for their own bodies. Some have imagined paradise to have been material, while others have imagined it to have been spiritual. However, it seems to me that just as man was created both sensitive and intellectual, so did this most sacred domain of his have the twofold aspect of being perceptible both to the senses and to the mind. For while in his body he dwelt in this most sacred and superbly beautiful place, as we have related, spiritually he resided in a loftier and far more beautiful place. There he had the indwelling God as a dwelling place and wore him as a glorious garment. He was wrapped about with his grace, and like some one of the angels he rejoiced in the enjoyment of that one most sweet fruit which is the contemplation of God, and by this he was nourished. Now this is indeed what is fittingly called the tree of life, for the sweetness of divine contemplation communicates a life uninterrupted by death to them that partake of it.”
Source

Scholastic

c. 1100 – 1500
1270
A.D.
Ramban Jewish
1194–1270
“THOU SHALT NOT EAT OF IT. He admonishes him against eating the fruit, for the tree itself is not edible. And so it says further on: But of the fruit of the tree which is in the midst of the garden. Similarly, And eat ye every one of his vine, and every one of his fig tree [means “of the fruit of his vine and of the fruit of his fig-tree].” Likewise, In toil shalt thou eat it means “eat its fruit.” IN THE DAY THOU EATEST THEREOF THOU SHALT SURELY DIE. At the time you eat of it, you will be condemned to die. Similarly, we find: On the day thou goest out, and walkest abroad any whither, thou shalt surely die.. This does not mean that he [Shimi] is to die immediately on that day; nor does it refer to his mere knowledge thereof, namely that he is to know that he will die eventually for all the living know that they shall die. But it does mean that at the time he [Shimi] goes forth from Jerusalem, he is liable to death at the hand of the king, and he will slay him when he pleases. [Similarly, in the verses:] But they shall not go in to see the holy things as they are being covered, lest they die; And they shall not bear sin for it, and die thereby. Their intent is [not that those who transgress against these prohibitions will die immediately], but only that they will be liable to death and will die on account of this sin of theirs. Now in the opinion of men versed in the sciences of nature, man was destined to die from the beginning of his formation, on account of his being a composite [of the four elements, and everything that is composite must revert to its original components]. But now He decreed that if he will sin he will die on account of his sin, like those who are liable to death at the hands of Heaven for such sins as a non-priest eating the Heave-offering, or a priest who has drunk wine or who does not wear the [required number of priestly] garments when performing the Service in the Sanctuary, and other cases. There the intent is that they will die prematurely on account of their sin. This is why in stating the punishment [after Adam ate of the fruit of the tree of knowledge] He said, Till thou return to the ground; for out of it wast thou taken; for dust thou art, and unto dust shalt thou return, by your nature. In the beginning before he sinned, Adam also ate of the fruit of the tree and of the seeds of the earth; and if so, there was bound to be depletion in his body, and he was subject to the cause of existence and destruction. [Thus the opinion of the men of science.] But in the opinion of our Rabbis, if Adam had not sinned he would have never died, since the higher soul bestows life forever, and the Will of G-d which is in him at the time of his formation would always cleave to him and he would exist forever, as I have explained in the verse, And G-d saw that it was good. Know that composition indicates destruction only in the opinion of those wanting in faith, who hold that creation came by necessity. But in the opinion of men of faith who say that the world was created by the simple Will of G-d, its existence will also continue forever as long as it is His desire. This is clear truth. That being so, In the day thou eatest thereof thou shalt surely die means that then you will be condemned to die since you will no longer exist forever by My Will. And the matter of eating [from the other trees] was to Adam at first only a source of enjoyment. And it is possible that the fruits of the garden of Eden were absorbed in his limbs as the Manna, and they sustain those that eat them. But when He decreed upon him, And thou shalt eat the herb of the field and with the sweat of his face he shall eat bread of the earth,, Verse 19. this [the food] became a cause for decomposition since he is dust, and dust he eats, and unto dust he shall return.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“But of the tree of knowledge of good and evil,.... Of the name of this tree, and the reasons of it; see Gill on Gen 2:9. thou shalt not eat of it; not that this tree had any efficacy in it to increase knowledge, and improve in science and understanding, as Satan suggested God knew; and therefore forbid the eating of it out of envy to man, which the divine Being is capable of; or that there was anything hurtful in it to the bodies of men, if they had eaten of it; or that it was unlawful and evil of itself, if it had not been expressly prohibited: but it was, previous to this injunction, a quite indifferent thing whether man ate of it or not; and therefore was pitched upon as a trial of man's obedience to God, under whose government he was, and whom it was fit he should obey in all things; and since he had a grant of all the trees of the garden but this, it was the greater aggravation of his offence that he should not abstain from it: for in the day thou eatest thereof thou shalt surely die; or "in dying, die" (z); which denotes the certainty of it, as our version expresses it; and may have regard to more deaths than one; not only a corporeal one, which in some sense immediately took place, man became at once a mortal creature, who otherwise continuing in a state of innocence, and by eating of the tree of life, he was allowed to do, would have lived an immortal life; of the eating of which tree, by sinning he was debarred, his natural life not now to be continued long, at least not for ever; he was immediately arraigned, tried, and condemned to death, was found guilty of it, and became obnoxious to it, and death at once began to work in him; sin sowed the seeds of it in his body, and a train of miseries, afflictions, and diseases, began to appear, which at length issued in death. Moreover, a spiritual or moral death immediately ensued; he lost his original righteousness, in which he was created; the image of God in him was deformed; the powers and faculties of his soul were corrupted, and he became dead in sins and trespasses; the consequence of which, had it not been for the interposition of a surety and Saviour, who engaged to make satisfaction to law and justice, must have been eternal death, or an everlasting separation from God, to him and all his posterity; for the wages of sin is death, even death eternal, Rom 6:23. So the Jews (a) interpret this of death, both in this world and in the world to come. (z) Pagninus, Montanus, &c. (a) Tikkune Zohar, correct. 24. fol. 68. 1. correct. 54. fol. 90. 2. correct. 66. fol. 100. 1.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“Of the tree of the knowledge - thou shalt not eat - This is the first positive precept God gave to man; and it was given as a test of obedience, and a proof of his being in a dependent, probationary state. It was necessary that, while constituted lord of this lower world, he should know that he was only God's vicegerent, and must be accountable to him for the use of his mental and corporeal powers, and for the use he made of the different creatures put under his care. The man from whose mind the strong impression of this dependence and responsibility is erased, necessarily loses sight of his origin and end, and is capable of any species of wickedness. As God is sovereign, he has a right to give to his creatures what commands he thinks proper. An intelligent creature, without a law to regulate his conduct, is an absurdity; this would destroy at once the idea of his dependency and accountableness. Man must ever feel God as his sovereign, and act under his authority, which he cannot do unless he have a rule of conduct. This rule God gives: and it is no matter of what kind it is, as long as obedience to it is not beyond the powers of the creature who is to obey. God says: There is a certain fruit-bearing tree; thou shalt not eat of its fruit; but of all the other fruits, and they are all that are necessary, for thee, thou mayest freely, liberally eat. Had he not an absolute right to say so? And was not man bound to obey? Thou shalt surely die - מות תמות moth tamuth; Literally, a death thou shalt die; or, dying thou shalt die. Thou shalt not only die spiritually, by losing the life of God, but from that moment thou shalt become mortal, and shalt continue in a dying state till thou die. This we find literally accomplished; every moment of man's life may be considered as an act of dying, till soul and body are separated. Other meanings have been given of this passage, but they are in general either fanciful or incorrect.”
Source
1849
A.D.
1774–1849
“The death of the soul, and become obnoxious to that of the body; thou shalt become a mortal and lose all the privileges of innocence. Though Adam lived 930 years after this, he was dying daily; he carried along with him the seeds of death, as we do, from our very conception. He had leave to eat of any fruit in this delicious garden, one only excepted, and this one prohibition makes him more eager to taste of that tree than of all the rest. So we struggle constantly to attain what is forbidden, and covet what is denied, cupimusque negata. God laid this easy command upon Adam, to give him an opportunity of shewing his ready obedience, and to assert his own absolute dominion over him. Eve was already formed, and was apprised of this positive command, (Chap. iii. 3.) and therefore, transgressing, is justly punished with her husband. True obedience does not inquire why a thing is commanded, but submits without demur. Would a parent be satisfied with his child, if he should refuse to obey, because he could not discern the propriety of the restraint? If he should forbid him to touch some delicious fruits which he had reserved for strangers, and the child were to eat them, excusing himself very impertinently and blasphemously, with those much abused words of our Saviour, It is not what enters into the mouth that defiles a man, &c. would not even a Protestant parent be enraged and seize the rod, though he could not but see that he was thus condemning his own conduct, in disregarding, on the very same plea, the fasts and days of abstinence, prescribed by the Church and by God’s authority? All meats are good, as that fruit most certainly was which Adam was forbidden to eat; though some have foolishly surmised that it was poisonous; but, the crime of disobedience draws on punishment. (Haydock) — Even when the sin is remitted, as it was to Adam, the penalty is not of course released, as some have pretended. This also clearly appears in baptized infants, who suffer the penalties due to original sin, as much as those who have not been admitted to the laver of regeneration. (St. Augustine; Worthington; Tirinus, &c.) — If on this occasion, Eve had alone transgressed, as she was not the head, her sin would have hurt only herself. But with Adam, the representative of all his posterity, God made a sort of compact, (Osee vi. 7.) giving him to understand, that if he continued faithful, his children should be born in the state of innocence like himself, happy and immortal, to be translated in due time to a happier Paradise, &c. but if he should refuse to obey, his sin should be communicated to all his race, who should be, by nature, children of wrath. — (St. Augustine, City of God xvi. 27; Ven. Bede in Luc. 11; &c.) — (Haydock) (Calmet)”
Source
1871
A.D.
1871
“thou shalt not eat of it . . . thou shalt surely die--no reason assigned for the prohibition, but death was to be the punishment of disobedience. A positive command like this was not only the simplest and easiest, but the only trial to which their fidelity could be exposed.”
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.