1. Man created in God’s image
2. Free will and man’s fallen nature
3. Man’s mortality and immortality
4. Tripartite Nature of Man
IRENAEUS: Now God shall be glorified in His handiwork, fitting it so as to be conformable to, and modeled after, His own Son. For by the hands of the Father, that is, by the Son and the Holy Spirit, man, and not [merely] a part of man, was made in the likeness of God. Now the soul and the spirit are certainly a part of the man, but certainly not the man; for the perfect man consists in the commingling and the union of the soul receiving the spirit of the Father, and the admixture of that fleshly nature which was moulded after the image of God. For this reason does the apostle declare, “We speak wisdom among them that are perfect,” terming those persons “perfect” who have received the Spirit of God, and who through the Spirit of God do speak in all languages, as he used Himself also to speak. In like manner we do also hear many brethren in the Church, who possess prophetic gifts, and who through the Spirit speak all kinds of languages, and bring to light for the general benefit the hidden things of men, and declare the mysteries of God, whom also the apostle terms “spiritual,” they being spiritual because they partake of the Spirit, and not because their flesh has been stripped off and taken away, and because they have become purely spiritual. For if any one take away the substance of flesh, that is, of the handiwork [of God], and understand that which is purely spiritual, such then would not be a spiritual man but would be the spirit of a man, or the Spirit of God. But when the spirit here blended with the soul is united to [God’s] handiwork, the man is rendered spiritual and perfect because of the outpouring of the Spirit, and this is he who was made in the image and likeness of God. But if the Spirit be wanting to the soul, he who is such is indeed of an animal nature, and being left carnal, shall be an imperfect being, possessing indeed the image [of God] in his formation (in plasmate), but not receiving the similitude through the Spirit; and thus is this being imperfect. Thus also, if any one take away the image and set aside the handiwork, he cannot then understand this as being a man, but as either some part of a man, as I have already said, or as something else than a man. For that flesh which has been moulded is not a perfect man in itself, but the body of a man, and part of a man. Neither is the soul itself, considered apart by itself, the man; but it is the soul of a man, and part of a man. Neither is the spirit a man, for it is called the spirit, and not a man; but the commingling and union of all these constitutes the perfect man. And for this cause does the apostle, explaining himself, make it clear that the saved man is a complete man as well as a spiritual man; saying thus in the first Epistle to the Thessalonians, “Now the God of peace sanctify you perfect (perfectos); and may your spirit, and soul, and body be preserved whole without complaint to the coming of the Lord Jesus Christ.” Now what was his object in praying that these three—that is, soul, body, and spirit—might be preserved to the coming of the Lord, unless he was aware of the [future] reintegration and union of the three, and [that they should be heirs of] one and the same salvation? For this cause also he declares that those are “the perfect” who present unto the Lord the three [component parts] without offense. Those, then, are the perfect who have had the Spirit of God remaining in them, and have preserved their souls and bodies blameless, holding fast the faith of God, that is, that faith which is [directed] towards God, and maintaining righteous dealings with respect to their neighbors. Against Heresies, 5:6:1 (ANF, 1.531-532).
ORIGEN: But that fate also which is mentioned in the Gospels as overtaking unfaithful stewards who, it is said, are to be divided, and a portion of them placed along with unbelievers, as if that portion which is not their own were to be sent elsewhere, undoubtedly indicates some kind of punishment on those whose spirit, as it seems to me, is shown to be separated from the soul. For if this Spirit is of divine nature, i.e., is understood to be a Holy Spirit, we shall understand this to be said of the gift of the Holy Spirit: that when, whether by baptism, or by the grace of the Spirit, the word of wisdom, or the word of knowledge, or of any other gift, has been bestowed upon a man, and not rightly administered, i.e., either buried in the earth or tied up in a napkin, the gift of the Spirit will certainly be withdrawn from his soul, and the other portion which remains, that is, the substance of the soul, will be assigned its place with unbelievers, being divided and separated from that Spirit with whom, by joining itself to the Lord, it ought to have been one spirit. De Principiis, 2:10:7 (ANF, 4.296).