How do we know grace is central to the Christian faith?

The Apostle Paul reiterates in Galatians that salvation is purely of grace and not a blend of works. This doctrine is foundational to the Reformed understanding, aligning with passages like Ephesians 2:8-9, which states that we are saved by grace through faith, not by our own works. The sermons amplify this by showing how the stories in the Old Testament, including the accounts of Caleb and Othniel, illustrate God’s covenant of grace. Whenever there is a depiction of victory or fulfillment, it reflects God's effort to accomplish His will through grace, consistently making known His power and love for His people across both testaments.