What does the Bible say about substitution in atonement?

The concept of substitution is central to the atonement taught in scripture. The Lord Jesus Christ, as the sin bearer, is made to be sin for us, which allows us to be counted as righteous before God (2 Corinthians 5:21). This is famously outlined in Isaiah 53, which portrays Christ as wounded for our transgressions and bruised for our iniquities. By taking our place, He satisfies the demands of God's justice and righteousness, demonstrating the depth of God's grace in providing a mediator between Himself and sinful humanity.