Why is Christ alone central to salvation in Reformed theology?

In Reformed theology, Christ alone is central to salvation because He is the only one who fulfills the law and bears the punishment for sin on our behalf. Ephesians 2:8-9 encapsulates this belief, stating that we are saved by grace through faith, not of works. This highlights the Reformed emphasis on Christ’s imputed righteousness and the complete sufficiency of His sacrifice to meet God's holiness. Salvation cannot be earned or supplemented by any human effort; it is fully secured through Christ, emphasizing the grace of God alone.