A very nice summary, with patristic citations, can be found at: Free Will and Death
Below are several lengthy citations from Sts. Athanasios (On the Incarnation of the Word), John Chrysostom (Homilies on Genesis and on Romans), and John of Damascus (An Exact Exposition of the Orthodox Faith).
St. Athanasius, On the Incarnation of the Word
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 that if they transgressed and turned back, and became evil, they might know that they were incurring that corruption in death which was theirs by nature: no longer to live in paradise, but cast out of it from that time forth to die and to abide in death and in corruption. Now this is that of which Holy Writ also gives warning, saying in the Person of God: “Of every tree that is in the garden, eating thou shalt eat: but of the tree of the knowledge of good and evil, ye shall not eat of it, but on the day that ye eat, dying ye shall die.” But by “dying ye shall die,” what else could be meant than not dying merely, but also abiding ever in the corruption of death?(3.4-5)
Thus, then, God has made man, and willed that he should abide in incorruption; but men, having despised and rejected the contemplation of God, and devised and contrived evil for themselves (as was said in the former treatise), received the condemnation of death with which they had been threatened; and from thenceforth no longer remained as they were made, but were being corrupted according to their devices; and death had the mastery over them as king. For if, out of a former normal state of nonexistence, they were called into being by the Presence and loving-kindness of the Word, it followed naturally that when men were bereft of the knowledge of God and were turned back to what was not (for what is evil is not, but what is good is), they should, since they derive their being from God who IS, be everlastingly bereft even of being; in other words, that they should be disintegrated and abide in death and corruption. For man is by nature mortal, inasmuch as he is made out of what is not; but by reason of his likeness to Him that is (and if he still preserved this likeness by keeping Him in his knowledge) he would stay his natural corruption, and remain incorrupt; as Wisdom says: “The taking heed to His laws is the assurance of immortality;” but being incorrupt, he would live henceforth as God, to which I suppose the divine Scripture refers, when it says: “I have said ye are gods, and ye are all sons of the most Highest; but ye die like men, and fall as one of the princes.”For God has not only made us out of nothing; but He gave us freely, by the Grace of the Word, a life in correspondence with God. But men, having rejected things eternal, and, by counsel of the devil, turned to the things of corruption, became the cause of their own corruption in death, being, as I said before, by nature corruptible, but destined, by the grace following from partaking of the Word, to have escaped their natural state, had they remained good. For because of the Word dwelling with them, even their natural corruption did not come near them, as Wisdom also says: “God made man for incorruption, and as an image of His own eternity; but by envy of the devil death came into the world.” But when this was come to pass, men began to die, while corruption thence-forward prevailed against them, gaining even more than its natural power over the whole race, inasmuch as it had, owing to the transgression of the commandment, the threat of the Deity as a further advantage against them.(4.4-5.2)
What the saint is saying above is not that death and corruption are the per se intended state of man, but rather that man does not have in himself the principle of life. That is to say, we are not inherently immortal, but are only living and immortal insofar as we remain in communion with God. Only God is truly immortal and alive in se. For man all his life and immortality is contingent. It is thus "natural" to man to be alive and immortal in that this is God's intended will for man. But insofar as man rejects God's will, he cuts himself off from that life and immortality, and thus, not having life and immortality in himself "naturally" succumbs to death and corruption, which is "unnatural" in that it is not God's will for man.
For this purpose, then, the incorporeal and incorruptible and immaterial Word of God comes to our realm, howbeit he was not far from us before. For no part of Creation is left void of Him: He has filled all things everywhere, remaining present with His own Father. But He comes in condescension to shew loving-kindness upon us, and to visit us. And seeing the race of rational creatures in the way to perish, and death reigning over them by corruption; seeing, too, that the threat against transgression gave a firm hold to the corruption which was upon us, and that it was monstrous that before the law was fulfilled it should fall through: seeing, once more, the unseemliness of what was come to pass: that the things whereof He Himself was Artificer were passing away: seeing, further, the exceeding wickedness of men, and how by little and little they had increased it to an intolerable pitch against themselves: and seeing, lastly, how all men were under penalty of death: He took pity on our race, and had mercy on our infirmity, and condescended to our corruption, and, unable to bear that death should have the mastery—lest the creature should perish, and His Father’s handiwork in men be spent for nought—He takes unto Himself a body, and that of no different sort from ours. For He did not simply will to become embodied, or will merely to appear. For if He willed merely to appear, He was able to effect His divine appearance by some other and higher means as well. But He takes a body of our kind, and not merely so, but from a spotless and stainless virgin, knowing not a man, a body clean and in very truth pure from intercourse of men. For being Himself mighty, and Artificer of everything, He prepares the body in the Virgin as a temple unto Himself, and makes it His very own as an instrument, in it manifested, and in it dwelling. 4. And thus taking from our bodies one of like nature, because all were under penalty of the corruption of death He gave it over to death in the stead of all, and offered it to the Father—doing this, moreover, of His loving-kindness, to the end that, firstly, all being held to have died in Him, the law involving the ruin of men might be undone (inasmuch as its power was fully spent in the Lord’s body, and had no longer holding-ground against men, his peers), and that, secondly, whereas men had turned toward corruption, He might turn them again toward incorruption, and quicken them from death by the appropriation of His body and by the grace of the Resurrection, banishing death from them like straw from the fire. (8)
For the Word, perceiving that no otherwise could the corruption of men be undone save by death as a necessary condition, while it was impossible for the Word to suffer death, being immortal, and Son of the Father; to this end He takes to Himself a body capable of death, that it, by partaking of the Word Who is above all, might be worthy to die in the stead of all, and might, because of the Word which was come to dwell in it, remain incorruptible, and that thenceforth corruption might be stayed from all by the Grace of the Resurrection. Whence, by offering unto death the body He Himself had taken, as an offering and sacrifice free from any stain, straightway He put away death from all His peers by the offering of an equivalent. For being over all, the Word of God naturally by offering His own temple and corporeal instrument for the life of all satisfied the debt by His death. And thus He, the incorruptible Son of God, being conjoined with all by a like nature, naturally clothed all with incorruption, by the promise of the resurrection. For the actual corruption in death has no longer holding-ground against men, by reason of the Word, which by His one body has come to dwell among them. And like as when a great king has entered into some large city and taken up his abode in one of the houses there, such city is at all events held worthy of high honour, nor does any enemy or bandit any longer descend upon it and subject it; but, on the contrary, it is thought entitled to all care, because of the king’s having taken up his residence in a single house there: so, too, has it been with the Monarch of all. For now that He has come to our realm, and taken up his abode in one body among His peers, henceforth the whole conspiracy of the enemy against mankind is checked, and the corruption of death which before was prevailing against them is done away. For the race of men had gone to ruin, had not the Lord and Saviour of all, the Son of God, come among us to meet the end of death. (9)
St. Chrysostum, Homilies on Genesis (Gen 2:4b-3:24)
(Homily 13, pp 173-174) Not so, however, in the case of the human person: first its body is created from the dust, and afterwards the power of life is given to it, and this is the being of the soul. Accordingly Moses said about the beasts. "Its blood is its life." [ Lev 17:11 ] But in the case of the human person its being is incorporeal and immortal, and has a great superiority over the body, to the same extent as incorporeal form surpasses the corporeal.
(Homily 15, pp. 202-203) . . . up till that time [the Fall] they were living like angels in paradise and so they were not burning with desire, not assaulted by other passions, not subject to the needs of nature, but on the contrary were created incorruptible and immortal . . .
(Homily 16, p. 221) The former tree [of knowledge of good and evil] brought death, death entering the scene after the Fall, remember, whereas the latter [the "tree" of the Cross] endowed us with immortality; one drove us from paradise, the other led us up to heaven;
(Homily 17, p. 246) I mean, how could we avoid the appearance of ingratitude if, while he who is God and immortal does not decline to take on himself our mortal nature and earthly character, free us from the ancient curse of death, lead us to highest heaven, honor us with his ancestral home and deem us worthy of being honored by all the heavenly host, whereas we are not ashamed to requite him in just the opposite way, glueing our immortal soul (so to say) on to our body and thus ensuring that it becomes earthly, perishable and impotent?
(Homily 17, pp. 7-8) When God gave Adam the command [to not eat from the tree of knowledge of good and evil], he bade him abstain from nothing, with the single exception of that tree, and when he presumed to taste it he received the sentence of death; he made this clear to him in giving him the command in case he should break it, though he had given him no express instructions about the tree of life. I mean, since he created him immortal. as I see it and you can understand, it would have been possible for Adam, if he had wanted, to partake of that tree along with the others, a tree that was able to provide him with endless life--hence he was given no instruction about it.
St. John Chrysostom, Homilies on Romans, Homily X (Romans 5:12-6:4)
[Romans 5:12] As the best physicians always take great pains to discover the source of diseases, and go to the very fountain of the mischief, so doth the blessed Paul also. Hence after having said that we were justified, and having shown it from the Patriarch, and from the Spirit, and from the dying of Christ (for He would not have died unless He intended to justify), he next confirms from other sources also what he had at such length demonstrated. And he confirms his proposition from things opposite, that is, from death and sin. How, and in what way? He enquires whence death came in, and how it prevailed. How then did death come in and prevail? "Through the sin of one." But what means, "for that all have sinned?" This; he having once fallen, even they that had not eaten of the tree did from him, all of them, become mortal.
[Romans 5:13] And yet sin and grace are not equivalents, death and life are not equivalents, the Devil and God are not equivalents, but there is a boundless space between them.
In other words, there is no dualism here: on the one side sin and opposite to it grace. Grace is the greater and more power. So also life over death.
[Romans 5:17] What he says, amounts to this nearly. What armed death against the world? The one man's eating from the tree only. If then death attained so great power from one offence, when it is found that certain received a grace and righteousness out of all proportion to that sin, how shall they still be liable to death? And for this cause, he does not here say "grace," but "superabundance of grace." For it was not as much as we must have to do away the sin only, that we received of His grace, but even far more. For we were at once freed from punishment, and put off all iniquity, and were also born again from above (John iii. 3) and rose again with the old man buried, and were redeemed, justified, led up to adoption, sanctified, made brothers of the Only-begotten, and joint heirs and of one Body with Him, and counted for His Flesh, and even as a Body with the Head, so were we united unto Him! All these things then Paul calls a "superabundance" of grace, showing that what we received was not a medicine only to countervail the wound, but even health, and comeliness, and honor, and glory and dignities far transcending our natural state. And of these each in itself was enough to do away with death, but when all manifestly run together in one, there is not the least vestige of it left, nor can a shadow of it be seen, so entirely is it done away.
St. John Chrysostom, Homilies on Romans, Homily XI (Romans 6:5-18)
[Romans 6:12] He does not say, let not the flesh live or act, but, "let not sin reign," for He came not to destroy our nature, but to set our free choice aright. Then to show that it is not through any force or necessity that we are held down by iniquity, but willingly, he does not say, let it not tyrannize, a word that would imply a necessity, but let it not reign. For it is absurd for those who are being conducted to the kingdom of heaven to have sin empress over them, and for those who are called to reign with Christ to choose to be the captives of sin, as though one should hurl the diadem from off his head, and choose to be the slave of a frantic woman, who came begging, and was clothed in rags. Next since it was a heavy task to get the upper hand of sin, see how he shows it to be even easy, and how he allays the labor by saying, "in your mortal body." For this shows that the struggles were but for a time, and would soon bring themselves to a close. At the same time he reminds us of our former evil plight, and of the root of death, as it was from this that, contrary even to its beginning, it became mortal. Yet it is possible even for one with a mortal body not to sin. Do you see the abundancy of Christ's grace? For Adam, though as yet he had not a mortal body, fell. But thou, who hast received one even subject to death, canst be crowned. How then, is it that "sin reigns?" he says. It is not from any power of its own, but from thy listlessness. Wherefore after saying, "let it not reign," he also points out the mode of this reigning, by going on to say "that ye should obey it in the lusts thereof." For it is not honor to concede to it (i.e. to the body) all things at will, nay, it is slavery in the extreme, and the height of dishonor; for when it doth what it listeth, then is it bereft of all liberties; but when it is put under restraints, then it best keeps its own proper rank.
[Romans 6:14] What then is this statement? It is this; that our body, before Christ's coming, was an easy prey to the assaults of sin. For after death a great swarm of passions entered also. And for this cause it was not lightsome for running the race of virtue. For there was no Spirit present to assist, nor any baptism of power to mortify. (John vii. 39.)
St. John of Damascus, Exact Exposition of the Orthodox Faith, Book II, Chapter 12:
Now this being the case, He creates with His own hands man of a visible nature and an invisible, after His own image and likeness: on the one hand man's body He formed of earth, and on the other his reasoning and thinking soul He bestowed upon him by His own inbreathing, and this is what we mean by "after His image." For the phrase "after His image" clearly refers to the side of his nature which consists of mind and free will, whereas "after His likeness "means likeness in virtue so far as that is possible.Further, body and soul were formed at one and the same time, not first the one and then the other, as Origen so senselessly supposes.
God then made man without evil, upright, virtuous, free from pain and care, glorified with every virtue, adorned with all that is good, like a sort of second microcosm within the great world. another angel capable of worship, compound, surveying the visible creation and initiated into the mysteries of the realm of thought, king over the things of earth, but subject to a higher king, of the earth and of the heaven, temporal and eternal, belonging to the realm of sight and to the realm of thought, midway between greatness and lowliness, spirit and flesh: for he is spirit by grace, but flesh by overweening pride: spirit that he may abide and glorify his Benefactor, and flesh that he may suffer, and suffering may be admonished and disciplined when he prides himself in his greatness: here, that is, in the present life, his life is ordered as an animal's, but elsewhere, that is, in the age to come, he is changed and-to complete the mystery-becomes deified by merely inclining himself towards God; becoming deified, in the way of participating in the divine glory and not in that of a change into the divine being.
But God made him by nature sinless, and endowed him with free will. By sinless, I mean not that sin could find no place in him (for that is the case with Deity alone), bat that sin is the result of the free volition he enjoys rather than an integral part of his nature; that is to say, he has the power to continue and go forward in the path of goodness, by co-operating with the divine grace, and likewise to turn from good and take to wickedness, for God has conceded this by conferring freedom of will upon him. For there is no virtue in what is the result of mere force.
The soul, accordingly, is a living essence, simple, incorporeal, invisible in its proper nature to bodily eyes, immortal, reasoning and intelligent, formless, making use of an organised body, and being the source of its powers of life, and growth, and sensation, and generation, mind being but its purest part and not in any wise alien to it; (for as the eye to the body, so is the mind to the soul); further it enjoys freedom and volition and energy, and is mutable, that is, it is given to change, because it is created. All these qualities according to nature it has received of the grace of the Creator, of which grace it has received both its being and this particular kind of nature. (emphasis added)
St. John of Damascus, Exact Exposition of the Orthodox Faith, Book III, Chapter 1
Man, then, was thus snared by the assault of the arch-fiend, and broke his Creator's command, and was stripped of grace and put off his confidence with God, and covered himself with the asperities of a toilsome life (for this is the meaning of the fig-leaves); and was clothed about with death, that is, mortality and the grossness of flesh (for this is what the garment of skins signifies); and was banished from Paradise by God's just judgment, and condemned to death, and made subject to corruption.Posted by Clifton at February 8, 2005 10:45 AM