What does the gospel say about Christ's atonement?

The doctrine of atonement reveals the depth of Christ's sacrifice and its significance for believers. Hebrews 9:26 asserts that Christ appeared 'to put away sin by the sacrifice of Himself,' indicating that His blood holds the power to cleanse us from all unrighteousness. Furthermore, 2 Corinthians 5:21 states, 'He made Him who knew no sin to be sin for us, that we might become the righteousness of God in Him.' This reveals the substitutionary nature of Christ's death, allowing God's justice to be satisfied while freely offering grace to the elect. The efficacy of this atonement is rooted in God's sovereign choice and serves as the cornerstone of the assurance we have in our salvation.