In his 2nd century work Against Heresies, St. Irenaeus of Lyons spends quite a bit of time talking about the problematic ideas of his time. But what were the underlying convictions that informed the way he approached those problematic ideas?

Marcus Grodi and Msgr. Jeffrey Steenson look at the apostolic pedigree of St. Irenaeus, who was connected to St. John the Apostle through St. Polycarp, and discuss the well of belief from which St. Irenaeus drew when making his arguments.