This episode of Christendom and the World Pastor Andrew Preus talks with Rev. Dr. Daniel N. Harmelink, tracing his vocational journey from parish ministry in California to his current work at the Concordia Historical Institute in St. Louis. Pastor Harmelink reflects on the significance of preserving the history of the Lutheran Church—Missouri Synod, particularly through times of crisis and change. The discussion explores the theological implications of church conventions, the authority of scripture, and the enduring relevance of law and gospel. With a focus on mission, identity, and faithful witness, this episode highlights the importance of deep theological engagement and the role of history in shaping the church's present and future.