How do we know that salvation is through faith in Christ alone?

Ephesians 2:8-9 clearly outlines the doctrine of salvation by grace through faith, reinforcing that it is not by our works that we gain acceptance before God. This truth is deeply rooted in the Reformed understanding of Sola Fide, emphasizing that faith itself is a gift from God (Ephesians 2:8). Believers are united with Christ in His death and resurrection, receiving the righteousness of Christ without any merit of their own. The necessity of faith in Christ as the sole means of salvation is evidenced throughout scripture, where the consistent biblical message points away from human efforts and directs us to reliance on Christ alone for redemption, showcasing God's grace in action.