How do we know that God's grace is sufficient for restoration?

David's encounter with the Amalekites teaches us that God fights for His people and achieves victory that leads to full recovery. The narrative illustrates that despite our failures and the seemingly overwhelming odds, God is capable of defeating sin and restoring what has been lost. David recovered everything the Amalekites took, which foreshadows the totality of Christ's redemptive work—He did not just provide a possible salvation but accomplished it fully on the cross. This reflects God’s grace, which is not merely sufficient but abundant, ensuring that believers lack nothing in Christ.