In this episode, we explore how the earliest Christians understood the idea of “orthodoxy”—not as a weapon or a boundary line, but as a way of preserving the shared memory of the apostolic community. Drawing from the lived experience of the first generations of believers, we look at how the Church tried to stay rooted in what had been handed down, even as new interpretations and questions emerged. Rather than framing “heresy” as a label for outsiders, we examine it historically: as the word early Christians used when a teaching drifted away from the common story they believed connected them back to Jesus and the apostles. This is a calm, historical journey into how those categories formed, why they mattered at the time, and what they reveal about the early Christian desire for unity and continuity.