Why is salvation through Christ alone emphasized in the Bible?

The exclusivity of salvation through Christ is a core tenet of Christian doctrine, as articulated in John 14:6 where Jesus proclaims, 'I am the way, the truth, and the life. No man comes to the Father but by me.' This statement underscores that Christ is not one of many ways but the singular and necessary means of reconciliation with God. The entirety of Scripture supports this view, indicating that any attempt to add works or other mediators undermines the grace of God. Salvation is founded on Christ's completed work on the cross, affirming that belief in Him brings forgiveness of sins and eternal life. This truth assures believers of their standing before God, basing it solely on Christ’s righteousness.