How do we know God preserves true faith throughout church history?

Despite the church's drift into institutionalism and complexity, God has preserved a faithful remnant at every stage of church history. This is evident from the early apostolic church through the Reformation and into modern times. God's commitment to His people reveals His intention to call them back to biblical simplicity and the core tenets of faith. Historical movements, such as the Reformers, served as instruments of grace to restore the Gospel's purity and the belief that every believer is a priest unto God. As such, the continuity and recovery of true faith demonstrate God’s sovereignty and faithfulness over the ages.