How do we know that Christ's salvation is certain?

The certainty of Christ's salvation lies in the nature of God’s promises and their fulfillment. Isaiah 49:8 reveals that God heard and helped Christ at the appointed time of salvation. Christ's perfect obedience and sacrificial death were essential to fulfilling these divine promises, which ensures that all who believe in Him will not perish but have eternal life. The Scriptures record that God preserved Jesus throughout His life, demonstrating that His covenant stands secure for the elect. As believers trust in Christ, they participate in the covenant that guarantees their salvation and preservation unto eternity.