What does the Bible say about Christ's atoning death?

The atoning death of Christ is a fundamental aspect of the Gospel as articulated in 1 Corinthians 15:3-4. Paul emphasizes that Christ's death was not a mere natural occurrence but a judicial, penal death where He suffered the penalty for sin on behalf of others. This is affirmed throughout Scripture, including in Isaiah 53, where Christ is prophesied to bear the sins of many. He died to satisfy God's justice, as no remission of sin is possible without the shedding of blood (Hebrews 9:22).