How do we know the doctrine of a new and living way is true?

Hebrews 10:20 presents Jesus as the 'new and living way,' distinct from the old covenant of works. This new way emphasizes faith in Christ rather than adherence to the law for salvation. The assurance of this truth is further reinforced by Ephesians 2:8, which states that by grace we are saved through faith, underscoring that salvation is a divine gift rather than a human achievement. The continuous potency of Christ's sacrifice serves as a reminder of its ever-present efficacy for believers.