Some books, in any form of religious education, simply should not be omitted. Unfortunately, some religious traditions frequently omit requiring seminary students to read On the Incarnation by Saint Athanasius. I regard this as a major omission in my Presbyterian undergraduate education (major in philosophy) and in my seminary education in preparation for ministry. On the Incarnation is not only one of the great religious texts of history but also a literary and philosophical masterpiece of its day.
Soon, Advent and Christmas will be upon us. On Christmas Eve, people all over the world will gather to celebrate the birth of Christ. In most cases, the pastor or priest will exercise good judgment and stick closely to the Christmas story in delivering his homily. Yet behind that celebration lies a great theological truth recognized by the early church and by Christians ever since: God became human in the person of Jesus of Nazareth, with important consequences for the human race. On the Incarnation is one of the most important defenses of that fundamental Christian belief.
Athanasius
The author, Athanasius, is one of the most important figures in Christian history. When the Council of Nicaea met in 325 A.D., Athanasius was present as a deacon serving under his bishop, Alexander. Three years later, he was elected bishop of Alexandria, a position he held on and off until his death. By the time Athanasius died, he had been Bishop of Alexandria for about 46 years, exiled five times for seventeen years total, and subjected to persecution few figures in history have endured. During his exiles, Athanasius deepened his spiritual life in the desert, later writing a biography of Saint Anthony, the great desert father, and pondered the Christian faith in a way that enabled him to write his theological works. Two of those theological works are extremely important to Christian faith and history. The first is Against the Gentiles, and the second is On the Incarnation. In the first book, Anthony defends the Christian faith against its pagan, Gentile opponents. In his second, Athanasius defends what we call “The Nicene Creed,” first promulgated by the Council of Nicaea. The second work has continuing importance for Christians everywhere.
The Council of Nicaea
Emperor Constantine called the Council of Nicaea in 325 A.D. in response to the religious views of Arius, a priest in Alexandria. Arius denied Jesus’ full divinity, arguing that, as the Son of God, he had to have a beginning and was therefore a created being, not divine in the sense of God the Father. Bishop Alexander, Athanasius’ mentor, held the opposite view, maintaining the full deity of the eternal Christ as the incarnate Word of God. To resolve the dispute that threatened the unity of his Empire’s new religion, Constantine convened a council of all Christian bishops in Nicaea in Asia Minor.
Many attending bishops had recently endured persecution under Diocletian and Galerius. These bishops bore the marks of the tortures they had endured on their bodies. The debate was long and heated. In the end, the Council promulgated the Nicene Creed, which confesses that: “We believe in one God, the Father Almighty, Maker of things visible and invisible. And in one Lord Jesus Christ, begotten not made, being of one substance (homoousios) with the Father.” The term homoousios means “of one Being” and affirms that the Son is identical in essence to the Father. The wording places Christ the Son on the same level as the Father as an uncreated Being. In other words, the Word of God became human in Christ.[1]
Although the Council of Nicaea established the fundamentals of the church’s Creed and defended the doctrine of the Trinity, it did not end the intellectual battle over Christ’s nature. Athanasius was the first, and perhaps greatest, defender of the Council of Nicaea’s decisions. This was due to his deep, thoughtful reflections on the council’s work and his willingness to endure suffering to defend the Orthodox faith. Thus, On the Incarnation was an important part of the defense of Nicaea and the church’s fundamental commitment to the uniqueness of Christ.
The Argument of On the Incarnation
In On the Incarnation, Athanasius defends the doctrine of Christ’s incarnation, crucifixion, and resurrection against both Jewish and pagan detractors. In arguing against the Jews, Athanasius draws on the Old Testament scriptures to show that Christ fulfilled all the requirements for a Messiah set forth in those scriptures. In refuting pagan opponents of Christianity, he relies on empirical evidence of Christ’s victory over pagan deities, which he assumes to be demons. It is important to recognize the brilliance of the book. In arguing against people of a religious heritage, he uses the contents of the book that summarize that heritage. Against the Gentiles, like Paul in Athens, he takes a different approach. Although the book was written centuries ago by someone with a very different worldview than the modern or postmodern worldview most of us carry today, it remains one of the great defining works of world history.
On the Incarnation offers a strong defense of the central doctrines of the Christian faith. The most fundamental is the belief that God created the world out of nothing. That is, the world, in its matter and order, is fully God’s creation and did not exist before God. God is therefore not part of creation. God is “uncreated,” whereas everything else is created. This contradicts the Greek view that God the Demiurge merely shaped pre-existing matter. It’s not necessary to go into the details, but the alternative in Athanasius’ day derives from a Greek view of a hierarchy of gods, in which a lesser god (the Demiurge) shaped what a greater god had created. Christ and the Holy Spirit, as fully divine, were not to be confused with pagan Greek theology.
Drawing on imagery contained in, for example, Proverbs 8, Athanasius shows that Christ, or the Word of God, existed before creation. That is to say, Christ is not a created being, nor is he the son of God in the sense of being other than God or a product of God’s action. God begot Him before creation, and He is not part of it. He is of the same being as God and embodies God the Father’s eternal wisdom.
Humans are not gods. However, God created the human race in His image: rational, mortal by nature, and gifted with the potential for communion with God and immortality, that is to say an uninterrupted communion with God that not even physical death can disturb. Unfortunately, the human race fell from its original state into its fallen state. In this state, the original image was besmirched, and the human race lost its potential for immortality and communion with God.
Athanasius argues that the fall of the human race into self-centered sinfulness placed God in a dilemma. God could not ignore the consequences of human sin and selfishness. Nevertheless, as the completely good God who wills that all human beings might be saved into communion with his wisdom and well-being, God could not leave the human race in its fallen condition without acting. Therefore, God became human and, so to speak, re-divinized the human race by taking on the human condition through his Word.[2]
The most famous quote in On the Incarnation is “God became human, so the humans might become God.”[3] Athanasius didn’t mean human beings literally become God; he meant we can have God’s character despite our humanity. In the East, this is called “Theosis,” while in the West we call it “Sanctification.” Theosis describes our becoming one with Christ, and Sanctification refers to becoming holy and set apart from the world, which is why Peter calls Christians a “Holy Priesthood” (1 Peter 2:9). Both terms point to our capacity to recover our divine likeness in Christ.
Becoming Like God
I remember, as a new Christian, being confused about what it meant to be remade in the likeness of Christ and to let Christ be the ultimate source of my thought and action. I remember wondering whether, in so doing, one lost one’s own unique humanity. Many people have the same concern. The answer Athanasius and the entire Christian tradition give is quite simple: “No.” In becoming Christians, humans don’t become Christ, nor is our individuality swallowed up by divinity. Instead, by the power of the Holy Spirit, humans can embody the Word of God in their own unique and personal way—but in a way that demands the life of discipleship and spiritual growth.
The Victory of the Incarnate Word
Many people ask themselves the question, “In becoming human, did the Word give up its place with God the Father?” Once again, the answer is, “No.” In the incarnation, the Word of God, without giving up its divinity, over the created universe, or presence in all creation, entered the human condition to rescue humanity from sin. By the resurrection, the Son of God conquered death because death could not possibly conquer the fully incarnate God. In the resurrection, while defeating the power of death and the dissolution of the human person, God also rescued the human race from the consequences of the Fall.[4] Paul in his letter to the Corinthians puts it this way:
Therefore, if anyone is in Christ, the new creation has come: The old has gone, the new is here! All this is from God, who reconciled us to himself through Christ and gave us the ministry of reconciliation: that God was reconciling the world to himself in Christ, not counting people’s sins against them. And he has committed to us the message of reconciliation. 20 We are therefore Christ’s ambassadors, as though God were making his appeal through us (2 Corinthians 5:17-20).
Athanasius regards the Resurrection of Christ as a public demonstration in world history of God’s victory over sin and death and of Christ’s nature as the fully incarnate Son of God. The Resurrection proves both God’s victory over death and Christ’s incarnation as the Word of God. Faith in Christ unleashes God’s resurrection power through the Holy Spirit. Christ enters human life, giving it a new dimension that results in a “new creation.” This new creation is no longer alienated from God and, ultimately, is restored to a right relationship with others and with creation itself.
Conclusion
I was born and baptized into a Christian family. I committed my life to Christ in 1977 after a long period of struggle and alienation from God. Although I was well aware of my new relationship with God, that awareness only began a process in which God acted in my life to restore the broken image he intended. I’d like to say the process is over, but it’s not. Not for me, and not for anyone else. The process is lifelong. The work of overcoming human self-centeredness, brokenness, limitations, and sinfulness is never finished in this life. The victory Christ won on the cross demanded a cross, and our human victory over sin and death requires our slow dying to all that is unhealthy within us.
On the Incarnation is not an easy book to read, but it is rewarding. Although Athanasius lived in the 4th century and held a worldview very different from ours, he wrestled with the same human problems we do. He also faced the same difficulty we face in explaining the Christian faith in a pagan world. We might not phrase our answers to the questions our fellow postmodern people ask exactly as Athanasius did for 4th-century pagans and new Christians, but his answers are eternally relevant, and the way he defends the gospel points to how we can embody it in our own day and time.
The version I read includes an introduction by C. S. Lewis, the author of Mere Christianity. After reading his introduction and then the book itself, I realized that Lewis had perhaps read it as a scholar or as a young man in the British schools of his day. The book helped form his basic view of the Christian faith, which he called “Mere Christianity.” If the greatest defender of orthodox Christianity in the 20th century benefited from reading On the Incarnation, we will likely benefit from reading this timeless classic.
Copyright 2026, G. Christopher Scruggs, All Rights Reserved
[1] The Council of Constantinople, held in 381 AD, affirmed the full divinity and consubstantiality (same substance) of the Holy Spirit with the Father and the Son, expanding the Nicene Creed. This completed the universal church’s doctrine of the Trinity.
[2] The Council of Chalcedon (451) affirmed that Christ is one single Person possessing two distinct natures (divine and human) united “without confusion, without change, without division, without separation” (known as “hypostatic union”).
[3] On the Incarnation, 107: “He was incarnate that we may become God” is the translation in the version I use.
[4] I’ve used the word rescue here to avoid the theological dispute over the nature of the rescue Christ performed on the cross. In the Reformed tradition, it’s common to use a legal, substitutionary doctrine of atonement. In this view, God paid the legal penalty for sin in rescuing the human race. In the Orthodox and other traditions, the emphasis is on Christ’s redemptive action that frees us from the consequences of our sin.







