Why is Christ central to salvation?

The Christian doctrine posits that Christ is the foundation of salvation. In Colossians 3:11, we see the declaration that 'Christ is all,' indicating that He holds supreme value and significance in every aspect of a believer's life. His righteousness, given to believers through faith, is the only means by which they can be justified before God. The belief in Christ's sufficient sacrifice and righteousness is pivotal for the assurance of salvation, fulfilling God's redemptive plan laid out in Scripture.