"The First Great Theologian of the Church"

VATICAN CITY, MARCH 29, 2007 (Zenit) - Here is a translation of the address Benedict XVI gave at the general audience Wednesday in St. Peter's Square. The reflection focused on St. Irenaeus of Lyons.

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Dear Brothers and Sisters!

In the catechesis on the great figures of the Church during the first centuries, today we reach the figure of an eminent personality, Irenaeus of Lyons. His biographical information comes from his own testimony, sent down to us by Eusebius in the fifth book of the "Storia Ecclesiastica."

Irenaeus was most probably born in Smyrna (today Izmir, in Turkey) between the years 135 and 140. There, while still a youth, he attended the school of Bishop Polycarp, for his part, a disciple of the apostle John. We do not know when he moved from Asia Minor to Gaul, but the move must have coincided with the first developments of the Christian community in Lyons: There, in 177, we find Irenaeus mentioned among the college of presbyters.

That year he was sent to Rome, bearer of a letter from the community of Lyons to Pope Eleutherius. The Roman mission took Irenaeus away from the persecution by Marcus Aurelius, in which at least 48 martyrs died, among them the bishop of Lyons himself, the 90-year-old Pothinus, who died of mistreatment in jail. Thus, on his return, Irenaeus was elected bishop of the city. The new pastor dedicated himself entirely to his episcopal ministry, which ended around 202-203, perhaps by martyrdom.

Irenaeus is above all a man of faith and a pastor. Like the Good Shepherd, he has prudence, a richness of doctrine, and missionary zeal. As a writer, he aims for a twofold objective: to defend true doctrine from the attacks of the heretics, and to clearly expound the truth of the faith. His two works still in existence correspond exactly to the fulfillment of these two objectives: the five books "Against Heresies," and the "Demonstration of Apostolic Preaching" (which could be called the oldest "catechism of Christian doctrine"). Without a doubt, Irenaeus is the champion in the fight against heresies.

The Church of the second century was threatened by so-called gnosticism, a doctrine which claimed that the faith taught by the Church was nothing more than symbolism for the simpleminded, those unable to grasp more difficult things. Instead, the initiated, the intellectuals -- they called themselves gnostics -- could understand what was behind the symbolism, and thus would form an elite, intellectual Christianity.

Obviously, this intellectual Christianity became more and more fragmented with different currents of thought, often strange and extravagant, yet attractive to many. A common element within these various currents was dualism, that is, a denial of faith in the only God, Father of all, creator and savior of humanity and of the world. To explain the evil in the world, they asserted the existence of a negative principle, next to the good God. This negative principle had created matter, material things.

Firmly rooted in the biblical doctrine of Creation, Irenaeus refuted dualism and the gnostic pessimism that devalued corporal realities. He decisively affirmed the original holiness of matter, of the body, of the flesh, as well as of the spirit. But his work goes far beyond the refutation of heresies: In fact, one can say that he presents himself as the first great theologian of the Church, who established systematic theology. He himself speaks about the system of theology, that is, the internal coherence of the faith.

The question of the "rule of faith" and its transmission lies at the heart of his doctrine. For Irenaeus, the "rule of faith" coincides in practice with the Apostles' Creed, and gives us the key to interpret the Gospel, to interpret the creed in light of the Gospel. The apostolic symbol, a sort of synthesis of the Gospel, helps us understand what the Gospel means, how we must read the Gospel itself.

In fact, the Gospel preached by St. Irenaeus is the one he received from Polycarp, bishop of Smyrna, and the Gospel of Polycarp goes back to the apostle John, Polycarp having been John's disciple. Thus, the true teaching is not that invented by the intellectuals, rising above the simple faith of the Church. The true Gospel is preached by the bishops who have received it thanks to an uninterrupted chain from the apostles.

These men have taught nothing but the simple faith, which is also the true depth of the revelation of God. Thus, says Irenaeus, there is no secret doctrine behind the common creed of the Church. There is no superior Christianity for intellectuals. The faith publicly professed by the Church is the faith common to all. Only this faith is apostolic, coming from the apostles, that is, from Jesus and from God.

To adhere to this faith publicly taught ...