Why is Jesus considered our substitute in salvation?

Isaiah 53:6 states that the Lord laid on Him the iniquity of us all. This underscores the doctrine of substitution, where Jesus takes upon Himself the sins of His people, paying the price we could not pay. He died in our stead, fulfilling the just requirements of the law, which demanded death for sin. This act of substitution is foundational to the gospel, showcasing God's grace in providing a mediator who fully identifies with our human nature and meets the righteous demands of the law through His perfect obedience and sacrificial death.