St. Athanasius’ Defense of Jesus’ Role as Messiah & the Conversion of the Gentiles

A form of argumentation that was used by St. Athanasius to defend Jesus’ Messiahship against the Jews was by appealing to the conversion of Gentiles; who began to forsake their idols and acknowledge the true God of Israel. This was a fulfillment of Old Testament prophecy, which morally held Jews to accept the undeniable evidence that Jesus is the Christ; as the scriptures are held to be authoritative by both Jews and Christians alike.

In his words:

“… when they see even heathens deserting their idols, and placing their hope, through Christ, on the God of Israel, do they deny Christ, Who was born of the root of Jesse after the flesh and henceforth is King? For if the nations were worshipping some other god, and not confessing the God of Abraham and Isaac and Jacob and Moses, then, once more, they would be doing well in alleging that God had not come. But if the Gentiles are honoring the same God that gave the law to Moses and made the promise to Abraham, and Whose word the Jews dishonored, why are they ignorant, or rather why do they choose to ignore, that the Lord foretold by the Scriptures has shone forth upon the world, and appeared to it in bodily form?” 

~ On the Incarnation, CHAPTER VI.

St. Athanasius’ defense of the Christ’s Divinity and Virgin Birth against the Jews

In St. Athanasius’ treatise ‘On the Incarnation’, he writes to a certain Macarius who was a proselyte to Christianity. Being inexperienced in apologetics, St. Athanasius had instructed him through this work to guide him on the Church’s teaching regarding the Omnipotence of the Word and His Incarnation. This was a doctrine which was challenged by both Jews and Gentiles alike; as it was a radical change from what was taught by history’s greatest philosophers, and exceeded human rationality.

For this particular post, we will be examining St. Athanasius’ rebuttal of the Jews, and how he proved the Incarnation from Holy Writ.


To initiate his rebuttal, he first addressed the Jew’s skepticism of Christ’s Life, Death, and Resurrection. He opens by appealing to the Old Testament scriptures; as they are shared by both Christians and the Jews alike since both religions revere them as being God inspired and therefore: authoritative, infallible, and inerrant. 

To cite him directly:

“First, then, we will consider the Jews. Their unbelief has its refutation in the Scriptures which even themselves read; for from cover to cover the inspired Book clearly teaches these things both in its entirety and in its actual words”

~ (On the Incarnation, Chapter VI). 

Following this, he claims that the Prophets foretold Christ’s Virgin Birth; and cites prophets such like Isaiah and Moses. 

Citing the Prophet Isaiah, he said:

“Prophets foretold the marvel of the Virgin and of the Birth from her, saying, “Behold, a virgin shall conceive and bear a son, and they shall call his name ‘Emmanuel,’ which means ‘God is with us’ (Isaiah 7:14)”

~ ibid.

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On Moderation of Speech – St. Ambrose of Milan

“Let us then guard our hearts, let us guard our mouths. Both have been written about. In this place we are bidden to take heed to our mouth; in another place you are told: “Keep your heart with all diligence” (Proverbs 4:23).

If David took heed, will you not take heed? If Isaiah had unclean lips — who said: “Woe is me, for I am undone, for I am a man, and have unclean lips” (Isaiah 6:5) — if a prophet of the Lord had unclean lips, how shall we have them clean?

But for whom was it written, unless it was for each one of us: “Hedge your possession about with thorns, and bind up your silver and gold, and make a door and a bar for your mouth, and a yoke and a balance for words” (Sirach 28:24-25)?

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