How do we know that Christ's death is sufficient for our salvation?

The sufficiency of Christ's death is affirmed throughout Scripture, particularly in Romans 6:6-7, where we learn that our old self was crucified with Christ. This means that Christ's sacrifice not only bears our sins but also renders sin powerless over believers. The blood of Christ removes our guilt and covers our sin, thus providing complete salvation. Additionally, Galatians 3:22 states that the Scriptures have concluded all under sin, revealing that we cannot rely on our works for justification. Instead, Jesus coming to save us ushers in a new covenant of grace, ensuring that our faith in Him is all that is needed for salvation.