Throughout his works, Irenaeus of Lyons (born in Asia Minor, d. c. 200) has many statements that could be termed ‘credal’. For a discussion of many of them, check out JND Kelly, Early Christian Creeds, pp. 76 ff. Here’s the most famous:
For the Church, though dispersed throughout the whole world, even to the ends of the earth, has received from the apostles and their disciples this faith: in one God, the Father Almighty, who made the heaven and the earth and the seas and all things that are in them; and in one Christ Jesus, the Son of God, who became incarnate for our salvation; and in the Holy Spirit, who proclaimed through the prophets the dispensations and the advents, and the birth from a virgin, and the passion, and the resurrection from the dead, and the incarnate ascension into heaven of the beloved Christ Jesus, our Lord, and his future manifestation from heaven in the glory of the Father to sum up all things and to raise up anew all flesh of the whole huiman race in order that . . . he should execute just judgement towards all; that he may send spiritual wickednesses, and the angels who transgressed and came into a state of rebellion together with the ungodly, and unrighteous, and wicked, and profane among men, into the everlasting fire; but may, as an act of Grace, confer immortality on the righteous and holy, and those who have kept his commandments, and have persevered in his love, some from the beginning, and others from their repentance, and may surround them with everlasting glory. (Against the Heresies 1.10.1, in A New Eusebius, pp. 111-112)
But to us there is but one God, the Father, of whom are all things, and we in him; and one Lord Jesus Christ, by whom are all things, and we by him. (KJV)
Irenaeus proclaims that the whole church throughout the world believes this regula fidei, or ‘rule of faith’ (the Greek is lost). A regula is a rule as in a straight line or a ruler. The regula is a guide to the content of the faith. His multiple statements vary in wording and in how much Irenaeus puts in, but they never differ. This, for Irenaeus, is Apostolic orthodoxy, handed down to the churches through the Apostolic Succession (we looked at this here); it runs counter to his great opponents, the Marcionites and the Gnostics.
Some may wonder how widespread Irenaeus’ orthodoxy really was; I would wager it was common enough in Gaul (France) for him to be elected bishop of Lyons, common enough in Asia Minor for him to think it traditional. It was common enough in Rome for Justin’s regula to be about the same, as well as for Tertullian’s Carthaginian regula. It looks like earlier and contemporaneous eastern baptismal formulae as well.
What this means, friends, is that something that looks very much like orthodoxy pre-dates Constantine. It may not be as precise as Nicene orthodoxy, but it is part of the journey that leads through Nicaea to Chalcedon. Yes, there were competing ‘orthodoxies’ or ‘Christianities’ such as the various forms of ‘Gnosticism’ and the Montanists of last week and the Marcionites and the ‘Judaising’ elements (‘Ebionites’ and ‘Quartodecimans’) and, later on, Donatists and Meletians and Paul of Samosata.
It also reminds us that the Church has ever sought to keep itself aligned with Scripture and that lenses such as Creeds exist to help us read the Bible well. Some claim, ‘No Creed but Christ!’ But the Gnostics read many of the same Scriptures as us, as did the Arians, and they came to very different conclusions. How can we know what is the true deposit of the faith, how can we know our reading of Scripture is faithful?
Irenaeus, with his rule of faith, shows us. If we believe these things, we are on the right path. If you remain unconvinced, I recommend works by Baptist scholar DH Williams; the introduction to Scripture, Tradition, and Interpretation is the quickest, accessible route to his thought.
If you are convinced, I hope you will not discard the creeds and their content, even if you tire of their exact wording. They help preserve an unbroken line of teaching that brings us to the very feet of the Apostles who walked with our Lord Christ.