Before Pentecost, the risen Christ’s followers gather in prayer, waiting on the Spirit’s promised power. In choosing Matthias to replace Judas, we see how the Spirit establishes the apostolic foundation of the church. The apostles are not self-appointed; they are Spirit-appointed witnesses to the saving work of Jesus. In this episode, we explore how God’s Spirit ensured that the apostolic message about Christ’s death, resurrection, and reign is authoritative for the church in every generation.