False teaching didn’t wait. From the start, the early church battled heresies that threatened the gospel itself. In this episode, we examine how movements like Gnosticism, Marcionism, and Montanism distorted truth—and how the church responded. We’ll explore the formation of the canon, the rise of creeds, and the struggle to preserve apostolic teaching. These early battles still shape today’s church, and understanding them helps us discern truth, pursue unity, and stand firm in the gospel.