What does the Bible say about the purpose of Christ's life and death?

According to Scripture, particularly in Ephesians 4 and other passages, the life and death of Christ were not merely attempts to provide salvation but were definitive acts of redemption for His people. His coming into the world was purposeful, as stated in Matthew 1:21, which proclaims He will save His people from their sins. This understanding emphasizes that Christ's atoning sacrifice was effectual, ensuring that all whom the Father had given to Him will indeed be saved. The resurrection further affirms that His mission was accomplished, and righteousness is now imputed to believers through faith in Him, as indicated in Romans 4:25.