St. Cyril of Alexandria

Summary

Podcast Summary: Catholic Saints – St. Cyril of Alexandria

Episode Details

• Title: Catholic Saints
• Host/Author: Augustine Institute
• Episode: St. Cyril of Alexandria
• Release Date: June 27, 2025

---

Introduction

In this insightful episode of Catholic Saints, host Mary McKeon engages in a profound discussion with Dr. Carl Vennerstrom, a professor at the Augustine Institute, to explore the life, legacy, and theological contributions of Saint Cyril of Alexandria. Aimed at deepening the faith of listeners, the conversation delves into Cyril's pivotal role in early Church controversies, his steadfast defense of orthodox Christology, and his enduring impact on Christian doctrine.

---

Early Life and Historical Context

Dr. Carl Vennerstrom sets the stage by highlighting the historical significance of St. Cyril of Alexandria:

"[00:59] Dr. Carl Vennerstrom: ...born in 376, during the fourth century, a crucial period for Christian doctrine..."

Cyril was born in Egypt in 376 AD and served as the Patriarch of Alexandria, a major center of early Christianity. He lived through a time of significant theological debate, particularly concerning the nature of Christ, which was central to the formation of Christian orthodoxy.

---

Cyril's Theological Contributions and Christology

The core of Cyril's legacy lies in his Christological teachings, especially his defense of the doctrine that Jesus Christ is both fully divine and fully human. Dr. Vennerstrom emphasizes Cyril's influence:

"[01:00] Dr. Carl Vennerstrom: ...hard to overestimate the importance of Saint Cyril of Alexandria, especially for the Church's teaching on Christ." [01:00]

Cyril's work was instrumental in articulating a unified Christological perspective, countering views that sought to separate Christ's divinity from his humanity.

---

Theological Controversies: Nestorius and the Council of Ephesus

A significant portion of the discussion focuses on Cyril's confrontation with Nestorius, the Patriarch of Constantinople, whose teachings sparked major theological conflict.

"[02:32] Dr. Carl Vennerstrom: ...involved in a controversy with Nestorius, which led to the Council of Ephesus in 431." [02:32]

Nestorius advocated for distinguishing between Christ's divine and human natures to the extent that he opposed the term Theotokos ("God-bearer") for Mary, arguing it implied that God could suffer or change. Cyril staunchly defended the use of Theotokos, emphasizing the unity of Christ's person:

"[12:53] Dr. Carl Vennerstrom: ...We can't be saved by God unless Christ is actually God." [18:04]

This theological stance was crucial in affirming that Jesus Christ's divinity and humanity were inseparable, ensuring the integrity of salvation history.

---

Council of Ephesus and Aftermath

The Council of Ephesus (431 AD) was a pivotal moment where Cyril's teachings were affirmed over Nestorian views after intense debates and political maneuvering.

"[02:32] ...the Council of Ephesus was in 431, and it sided with Cyril after long deliberations." [02:32]

Though Cyril died in 444 AD, his theological positions were later upheld by the Council of Chalcedon in 451 AD, solidifying his influence on mainstream Christianity.

---

Cyril's Legacy and Impact on Christianity

Dr. Vennerstrom elaborates on Cyril's enduring legacy:

"[03:48] ...he became the most important figure for thinking through ... Christ theologically, philosophically..." [03:48]

Cyril's vision ensured that future theological discourse remained anchored in the Nicene Creed, promoting a unified understanding of Christ's dual nature. His influence extended beyond theological circles, shaping the ecclesiastical structure and affirming the roles of patriarchal sees like Alexandria.

---

Cyril’s Role as a Heresy Fighter

St. Cyril is often revered as a defender of the faith, tirelessly combating heresies that threatened the Church's doctrine.

"[20:09] Mary McKeon: ...is he is called the Pillar of the Faith..." [20:09]

Although his tenure was marked by conflicts, including alleged associations with the murder of the pagan philosopher Hypatia, Christopher asserts that Cyril's sainthood underscores that sainthood encompasses both righteousness and the complexities of historical contexts.

---

Personal Qualities and Sanctity

In reflecting on St. Cyril's personal virtues, Dr. Vennerstrom highlights his humility and courage:

"[21:10] ...he had the intellect to engage in complex theological debates, but also had sensitivity to the faith of common people." [21:10]

Cyril's balanced character, marked by humility paired with unyielding determination, exemplifies his emulation of Christ-like qualities, making him a relatable and inspiring saint.

---

Final Reflections

The episode concludes with an appreciation of St. Cyril's multifaceted legacy as both a theological pillar and a model of sanctity, encouraging listeners to draw inspiration from his life in their own spiritual journeys.

"[22:12] Dr. Carl Vennerstrom: ...it was great." [22:12]

---

Conclusion

This episode of Catholic Saints offers a comprehensive and engaging exploration of St. Cyril of Alexandria, shedding light on his crucial role in shaping early Christian doctrine and his enduring influence on the Church. Through expert insights and thoughtful discussion, listeners gain a deeper understanding of Cyril's contributions, his struggles, and the qualities that render him a revered saint in Catholic tradition.

---

Notable Quotes with Timestamps

• "[00:59] Dr. Carl Vennerstrom: ...born in 376, during the fourth century, a crucial period for Christian doctrine..."
• "[12:53] Dr. Carl Vennerstrom: ...We can't be saved by God unless Christ is actually God."
• "[21:10] Dr. Carl Vennerstrom: ...he had the intellect to engage in complex theological debates, but also had sensitivity to the faith of common people."

---

Further Engagement

To delve deeper into the lives of the saints and enrich your understanding of Catholic faith, consider exploring more episodes of Catholic Saints by the Augustine Institute. Join their Mission Circle to support the spread of the Gospel's truth and beauty worldwide.

Transcript

[Podcast Host]

You're listening to a podcast on Catholic Saints. This podcast is produced by the Augustine Institute, an apostolate helping Catholics understand, live, and share their faith.

[Mary McKeon]

Welcome to Catholic Saints. My name is Mary McKeon, and I'm joined today with Dr. Carl Vennerstrom, professor here.

[Dr. Carl Vennerstrom]

Glad to be here.

[Mary McKeon]

Thank you for joining us. And today we are going to talk about Saint Cyril of Alexandria. So the series Catholic Saints. We are looking to the lives of saints, learning about them, learning about their legacy, to share with us inspiration for our time here on earth and to grow in sync to d ourselves. So St. Cyril of Alexandria feast day is January 28th. Can you give us some general overview about the saint?

[Dr. Carl Vennerstrom]

Yeah.

[Mary McKeon]

Set the stage.

[Dr. Carl Vennerstrom]

Absolutely. I think it's hard to overestimate the importance of Saint Cyril of Alexandria, especially for the Church's teaching on Christ. So who Christ is an important question, I think we can all agree. So pivotal question. Yeah. This is the big one. Who do you say that I am? So he was born in 376. Okay. So this is the fourth century. This is a big century for Christian doctrine. The Second Ecumenical Council, the Council of Constantinople, would be a few years after his birth. So born in an auspicious time, then dying in 444.

[Mary McKeon]

Okay.

[Dr. Carl Vennerstrom]

So as I said, he's important for this teaching on Christ. We could say Christology. He was the Patriarch of Alexandria, which is on the Nile river there in the. In the north of Egypt. So an Egyptian Christian, do we know.

[Mary McKeon]

Was he born in Egypt?

[Dr. Carl Vennerstrom]

Yeah, he was born in Egypt, a bit further south, but yes, yeah, he was born in Egypt. So Egyptians at this point in time spoke and wrote in Coptic. That was the sort of native language of Egypt, but then also Greek. So most, if not all of what we have from Cyril was written in Greek, I think sometimes translated into Coptic.

[Mary McKeon]

It's a very accurate language. So that's nice.

[Dr. Carl Vennerstrom]

Greek. Yeah, yeah. They have many words to choose from, so it's good. He found himself embroiled in a controversy with Nestorius, which led to the Council of Ephesus, which we can sort of go into more detail later about the nature or natures of Christ. This Council of Ephesus was in 431, and it sided with Cyril after a long set of deliberations and house arrests and problems and then drama and. Yeah, a lot of drama. And then after even more controversy, the Council of Chalcedon met in 451, 20 years later after Cyril's death, and in large part confirmed his teaching. So then for almost All Christians. He became kind of the most important figure for thinking through this sort of language and attitude in which we approach Christ theologically, philosophically, scripturally kind of thing.

[Mary McKeon]

Okay, so one quick question. Was it really, really within an 80 year period, if I'm calculating it right, that there were three different councils? If you said there is Constantinople, ephesus.

[Dr. Carl Vennerstrom]

Yes, like 70 years. Right.

[Mary McKeon]

Okay. And is it just because it's this pivotal period, like fertile soil in the church, where enough years have passed of the apostolic age, that there. I don't know. Why were there so many councils? Why are there so many councils, period?

[Dr. Carl Vennerstrom]

This is a good question. So to understand that, you sort of have to go back to the first ecumenical Council, which is Nicaea. And so the councils were called in most cases by the emperor. He didn't necessarily have the idea of the controversies or the problems. But the emperors, no matter their sort of religious piety, wanted peace within the empire. And often these theological problems led to sort of political discord. So there is a kind of motivation on the part of the emperors to resolve these doctrinal questions.

[Mary McKeon]

That is helpful. Thank you.

[Dr. Carl Vennerstrom]

Yeah. And then, yeah, I think the. The other element is then also related to the empire, that the universal church has more lines of connections kind of than it ever had before. And so what's happening in Asia Minor, in modern day Turkey, matters to people in Egypt, whereas it might not have mattered so much 200 years prior.

[Mary McKeon]

Sure. Okay. So, yeah, that great growth and expansion too, of the Church coincides with this.

[Dr. Carl Vennerstrom]

That's right, yeah.

[Mary McKeon]

And just to state the obvious was he was a priest. He was a bishop.

[Dr. Carl Vennerstrom]

Yeah, he was a bishop. So his uncle was the previous archbishop or patriarch of Alexandria.

[Mary McKeon]

Okay.

[Dr. Carl Vennerstrom]

This guy's name was Theophilus. And Egyptians from this period, it's like the historians that recount this, like, love to talk about how Egyptians love to riot. And. And also his uncle Theophilus. So that's one thing, but the other thing is his uncle, Theophilus, the awful Theophilus was good at sort of wielding this power. So he get monks sort of stirred up in a frenzy. He also was a sort of cataloger and condemner of heresies of many types, some which he seemed to have almost invented himself. Like, for instance, he brought up a lot of spurious charges against St. John Chrysostom.

[Mary McKeon]

His uncle the bishop, his uncle the bishop Theophilus. Okay.

[Dr. Carl Vennerstrom]

But actually Saint Cyril joined his uncle to go to this Council of oak which condemned St. John Chrysostom. Obviously not permanently. It didn't Stick. But yeah, anyways, he comes from a sort of lineage of fiery people. Yeah, right, right, exactly. And so a couple of examples he's often associated with. Let's just say one example with Hypatia. So Hypatia, by this time there were not. There was not the same prominence for pagan philosophers that there once had been in the Roman Empire, but still there were some pagan philosophers that were highly respected and they had their sort of circle of pagan students. And one of these was Hypatia, who is also. Also a woman, which is very rare for a philosopher with a sort of following in a school. And she had had some antagonisms and conflicts with Christians and a mob of monks and Christians and deacons, and this kind of thing was stirred up and. And they murdered her and sort of like tore her body to pieces. So she. She became sort of this like, pagan martyr figure. And she's still seen as sort of like this pagan hero, feminist saint or something like that. Okay, yeah, Or a pagan hero. Yeah, yeah. Like there's a lot of different groups that try to sort of claim her, claim her as her own. Yeah. And it's actually quite clear that Cyril didn't have anything to do with this, or at least there's no direct evidence tying to him. To him. And then he was accused of many things he didn't do by the Nestorians in these later controversies, and they never accused him of this. And if there had been a sort of hint of its plausibility, he probably would have been implicated. But yeah, he also had a lot of conflicts with the Jews in Alexandria, so he was no stranger to conflict anyways.

[Mary McKeon]

Okay, yes, that makes sense.

[Dr. Carl Vennerstrom]

And yet a saint and still a saint. Yes, yeah. A saint isn't just being nice. Mean people can become saints.

[Mary McKeon]

That's hopeful. Let's have hope. Patron of mean people.

[Dr. Carl Vennerstrom]

Yeah, well, yeah, something like that.

[Mary McKeon]

Yeah, no, that. Okay, well, thank you for kind of the context of. Of the time period of. Yes, just that, like, there are a lot of debates going on. So where did Nestorius come in?

[Dr. Carl Vennerstrom]

Yeah, so Nestorius. I think first it's helpful to explain the. The seas. So eventually there were sort of five patriarchal or ecumenical seas. Anyways. The first three that were important were Rome, Antioch, England and Alexandria. So sort of deep into Christian history, these were recognized as being patriarchal. Sees that is, they were founded by apostles. So Paul and Barnabas in Antioch, Peter in Rome, of course, and then St Mark in. In Alexandria. So apostles are people associated with apostles, right?

[Mary McKeon]

Yes.

[Dr. Carl Vennerstrom]

Then later Added to this group of important Cs and then called ecumenical seas are Constantinople and then even later than that, Jerusalem. So you think Jerusalem would be maybe the first ones, but it is actually the last of the five to get added. Despite its importance as a holy site, Jerusalem didn't have the same sort of ecclesiastical importance as these others. But Constantinople gets added. So Constantinople is a city which is sort of made up. It's not by the standards of Antioch and Rome. It's not an ancient city. Constantine, who aptly named it after himself, founded this city as a kind of new Rome in. And it's well placed in the Bosphorus for trade. And it's sort of this bridge between Europe and the Middle east and like.

[Mary McKeon]

The five most important hubs of Christian or Catholic Christian activity.

[Dr. Carl Vennerstrom]

Yeah, that's right. Yeah.

[Mary McKeon]

Sorry to cut you off.

[Dr. Carl Vennerstrom]

No, no, no, that's fine. Yeah. So Constantinople gets added because it's politically important, and then that means the bishop of Constantinople has also ecclesiastical importance. So.

[Mary McKeon]

Okay, okay.

[Dr. Carl Vennerstrom]

But yeah, like the five most important hubs. This is a good way to think about it. So Nestorius ends up being the bishop or the archbishop, the patriarch of Constantinople.

[Mary McKeon]

Okay.

[Dr. Carl Vennerstrom]

And he's a monk. He's a very serious moral person. He's very well educated. He's very precise in his terminology. And he had spent most of his life around people like that in a monastic setting. And so when he becomes the archbishop of Constantinople, he has a hard time adjusting to sort of popular piety. One, the most important example for this controversy is that he rejects that people call Mary Theotokos. So this means like bearer of God or the one who gives birth to God.

[Mary McKeon]

That's a strong claim.

[Dr. Carl Vennerstrom]

It is a strong claim. Yeah, that's right.

[Mary McKeon]

Thing named after the Blessed Mother. I'm curious.

[Dr. Carl Vennerstrom]

Okay. Yeah, yeah. So he was upset about this because. Well, the problem as he saw it was that this implied that God could be passable. He could like suffer or be changed. And God is impassable and. And he can't suffer. He can't change in.

[Mary McKeon]

Wait, what is passable? What does that mean?

[Dr. Carl Vennerstrom]

Passable just means passable. Yeah, well, the word pathos in Greek can mean a lot of different things, but it often. I think the best way to understand it probably is just to be passive, to experience something sort of outside of your will or. Yeah, to be moved rather than to move.

[Mary McKeon]

Okay.

[Dr. Carl Vennerstrom]

But it also associated with the emotions and sort of unpredictability, these kinds of things. So since God in himself can't be said to Suffer passion, because then he'd be imperfect, there'd be sort of something outside of his control. He can't. We can't say that God suffered or that God died or that God was born. And so to say that Mary gave birth to God is to say that God was like changed or that he suffered or had passion. So instead Nestorius wanted to say, you can call her Chrysotokos, that's fine. Christ means this, like this person that sort of unites the divine and the human and it's sort of fill in to refer to both. So you can call it the Chrysotokos, or you can say that she gave birth to Jesus, but you can't say that she gave birth to God. But this had this tradition of calling her Theotokos was old. And for Cyril it expressed something truly authentic about the Christian faith. And he actually relied. So his. One of his big points throughout his whole career as a theologian was that there's a, a single subject. So he wanted to avoid saying there's like this divine person who does miracles, is raised from the dead, and then there's this human person who is crucified, is beaten, weeps, weeps in the garden, weeps for Lazarus. And we call them both Christ. But it's really two, two persons or two sons, kind of, if you want to say there's a single who does all of those things. And in a kind of ingenious way, in multiple points in his writings, he depends on the Nicene Creed. And so this really well expresses this idea of a single subject. So we say that I believe in one Lord, Jesus Christ, the only begotten Son of God. And then it keeps referring to the Son of God. And it says, for us men and for our salvation, he came down from heaven, that is the Son of God, and by the Holy Spirit was incarnate of the Virgin Mary. Okay, so the Son of God, the Son God, was born of the Virgin Mary and became man for our sake. He that is the Son of God was crucified under Pontius Pilate. He suffered death and was buried and rose again on the third day in accordance with the Scriptures.

[Mary McKeon]

So he was trying to argue his perspective.

[Dr. Carl Vennerstrom]

Yeah, that's right.

[Mary McKeon]

Congruent with the Creed as it was.

[Dr. Carl Vennerstrom]

Yeah, but with Nestorius you would have to say we believe in one Lord, Jesus Christ, and he did all these things. But then we also believe in the Son of God, and he didn't do all those things.

[Mary McKeon]

Right.

[Dr. Carl Vennerstrom]

You would have to divide them up. And so he gets criticized sometimes for like being sort of too mysterious or incoherent. But actually, philosophically, it all holds together pretty well.

[Mary McKeon]

And the Nestorian perspective.

[Dr. Carl Vennerstrom]

Sorry, Saints cereals.

[Mary McKeon]

Of the cereals. Yes. Okay.

[Dr. Carl Vennerstrom]

Yeah. So this becomes very important at Ephesus. Everyone's kept under house arrest for like a year. There's all these controversies with the emperor, and people are sort of like, sneaking out letters and, like, the cane of a beggar who's, like, walking out of the city. All this kind of, like these crazy stories. And so it does give you some humility and patience with the controversies that happen now. It's like. It's true this and worse was happening. Like, all these intrigues and rivalries and.

[Mary McKeon]

More important topics, like being most important.

[Dr. Carl Vennerstrom]

Yeah, that's right.

[Mary McKeon]

Okay, so just to recap, the story was really trying to divide, like, the man part, the humanity part, from Jesus and only attributing to Mary that she's the mother of. Of Christ as human, not mother of Christ as God. And then Saint Cyril, in his philosophical clarity, clarification, I guess, is really trying to emphasize the unity of his community.

[Dr. Carl Vennerstrom]

All for the purpose of salvation, that we can't be saved unless we're saved by God, and we can't be saved by God unless Christ is actually God.

[Mary McKeon]

Since we're in 2023, you know, we. So are clear on the Church's teachings. But were there a lot of follow of Nestorius?

[Dr. Carl Vennerstrom]

Yeah.

[Mary McKeon]

At this time period? Like, was he making a lot of headway in.

[Dr. Carl Vennerstrom]

He did get a decent number of adherents and especially after he died. So there was the Council of Ephesus, but then again the Council of Chalcedon. After Chalcedon, there are people who took a sort of Nestorian route. They weren't following him personally because he was dead, but they sort of followed his followers and followed his. His teachings and the teachings of others associated with him. So these were especially Christians in the Far East. So the Syriac Church of the east, this is a church that went all the way to China, actually. And within Catholicism, Chaldean Catholics are people who belong to the Syriac Church of the east that then entered communion with Rome eventually.

[Mary McKeon]

Okay. But this church initially was following Nestorian.

[Dr. Carl Vennerstrom]

Yeah, yeah, yeah. At least roughly speaking.

[Mary McKeon]

Okay.

[Dr. Carl Vennerstrom]

So they had, like, a big patrimony, and a lot of Christians were historians or at least sort of along these lines for many hundreds of years. And still today. They still exist today.

[Mary McKeon]

Okay. But the Chalcedonians are in union with Rome.

[Dr. Carl Vennerstrom]

Yeah, we're Chalcedonians.

[Mary McKeon]

Okay, good to know.

[Dr. Carl Vennerstrom]

Yeah, you're a Chalcedonian.

[Mary McKeon]

That's interesting.

[Dr. Carl Vennerstrom]

Yeah.

[Mary McKeon]

Okay, well, so he was a. He. A heresy fighter.

[Dr. Carl Vennerstrom]

Yeah.

[Mary McKeon]

It seems like one of the most important things he was known for is.

[Dr. Carl Vennerstrom]

Really fighting the heretic. Yeah, he's called the Pillar of the Faith and the seal of all the Fathers.

[Mary McKeon]

Wow. Pillar of the faith. Was he. Do we know what he specifically is a patron of?

[Dr. Carl Vennerstrom]

That I'm not exactly sure.

[Mary McKeon]

Fighting?

[Dr. Carl Vennerstrom]

Yeah. Fighting heresy, maybe? Yeah, possibly. Yeah. He didn't have. There wasn't like a lot of devotion to him in the west until like the late 19th century, but he's probably still a patron of something. Yes, I'm sure I'll have to look it up.

[Mary McKeon]

And are there any other, I don't know, noteworthy. Lots of notary things about his life, but other important details that you think are worth mentioning or does that kind of paint a broad picture?

[Dr. Carl Vennerstrom]

I think that gives you the main bits.

[Mary McKeon]

Well, as you think about his life, my last question is, when you think of St. Cyril, what are some of his Christocentric qualities or what were. Yeah, qualities. When you're thinking about the way he lived his life in his sanctity, in his vocation, that really emulated Jesus. Besides fighting for his.

[Dr. Carl Vennerstrom]

Yeah, yeah. I think one element would be an insight into the simple faith of believers. So he obviously had the intellect to engage in really complex theological debates, but he also had the sort of sensitivity to. To. To look for insight from the way common people worship. So yeah, he. He had a kind of humility about him in that way. So. Yeah, and it's nice because that humility is paired with his kind of courage and I don't know, he just didn't care what people thought about him necessarily. So, yes, he was fiery and could be harsh, but then also had this sensitivity and humility, that balance.

[Mary McKeon]

That's beautiful. Wonderful. Well, thank you so much.

[Dr. Carl Vennerstrom]

Yeah, it was great.

[Mary McKeon]

Thanks for joining us on this episode of Catholic Saints and Saint Cyril of Alexandria. Pray for us. Thank you.

[Podcast Host]

You can watch these interviews in video format by visiting form.org or. Formed is an online Catholic streaming service created by the Augustan Institute and Ignatius Press. With award winning studies and parish programs, inspiring audio content, movies, ebooks, and family friendly kids programming to support the mission of the Augustan institute. Please visit missioncircle.org.