How do we know that Christ's life was important for our salvation?

The life of Christ is integral to our salvation as it provides the righteousness that we cannot achieve on our own. In the sermon, it is emphasized that Jesus Christ lived a sinless and holy life, fulfilling God's law perfectly. His life was essential not only for setting an example but also for serving as the righteousness that is imputed to believers. Moreover, it reinforces the idea that our salvation is not solely based on His death but also requires His life as our substitute, gloriously fulfilling divine justice. Without His perfect obedience, we would remain under divine wrath, but in Christ, we have a righteousness that enables us to stand before God.