How do we know that eternal redemption is only through Christ?

The doctrine of eternal redemption through Christ is foundational in Reformed theology. In Hebrews 9:12, we learn that Christ entered the holy place once for all, having obtained eternal redemption for us. His sacrifice was not merely a symbol, but a complete and perfect offering that satisfied divine justice. The veil of the temple being torn at His death (Matthew 27:51) illustrates that access to God is granted through Him alone. This means that outside of Christ, sinners remain in their condemnation. Only through faith in Him, acknowledged in Acts 4:12, can anyone be saved. Therefore, eternal redemption is a gift that Christ accomplished on behalf of His people and is ultimately found only in Him.