What does it mean that Christ is our substitute?

In Reformed theology, the concept of Christ as our substitute is central to the understanding of atonement. Jesus, in His sacrificial role, bore the punishment that was rightfully ours for our sins. Isaiah 53:5 articulates this, stating, 'But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes, we are healed.' Through His suffering and death, Christ willingly took our place, satisfying divine justice and securing forgiveness for those who believe. Moreover, this concept emphasizes that salvation is entirely through grace, as we cannot fulfill the requirements of the law ourselves. By faith in Christ, we accept His substitutionary atonement, leading to reconciliation with God and the gift of eternal life.