Why is understanding 'once and done' important for Christians?

'Once and done' is a foundational concept in Reformed theology, emphasizing that Christ's sacrifice was not only sufficient but entirely complete for the redemption of God's people. It reminds us that we do not earn salvation through our works; rather, it is Christ’s finished work that secures our place before God. This understanding offers profound assurance, allowing believers to rest in the knowledge that their salvation is not contingent upon their ability to uphold the law, but rather is contingent solely upon Christ's obedience and sacrifice. Consequently, this doctrine fosters gratitude and a deeper love for God, as every believer recognizes that their eternal life is a gracious gift from a loving Savior.