How do we know Jesus' sacrifice was necessary for salvation?

The necessity of Jesus' sacrifice is grounded in the Scriptures, particularly in Isaiah 53:10, which states, 'It was the Lord's will to crush him and cause him to suffer.' This verse points to God's sovereign will in orchestrating salvation through the suffering of Christ. As our representative, Jesus, the sinless One, took upon Himself the sins of many, making Him the only suitable sacrifice to atone for sin. This concept is further emphasized in 2 Corinthians 5:21, which says, 'For he made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him.'

Salvation cannot be achieved by human efforts or merit; it requires a perfect substitute. The Gospel emphasizes that the death of Christ is not merely a historical event but a necessary act in God's plan to redeem His elect, ensuring that the consequences of sin are adequately addressed. By His death, Jesus satisfies God's justice and secures the salvation of His people, allowing them to be reconciled to God. This central tenet of the faith underpins the doctrine of total depravity, illustrating that, apart from Christ's intervention, all are lost.