How do we know that the New Covenant is better than the Old Covenant?

The superiority of the New Covenant over the Old Covenant is rooted in its nature and execution. The Old Covenant, typified by the law and sacrifices that could never take away sins (Hebrews 10:1-4), was merely a shadow of the realities to come. The New Covenant, established by Christ's death, fulfills the law and offers complete redemption and forgiveness through His once-for-all sacrifice (Hebrews 9:28). This covenant guarantees salvation through faith and does not require the law's observance for righteousness, as Paul explains in Romans 8:1-4, affirming that believers are now 'not under the law but under grace.' Therefore, the New Covenant, characterized by grace and the internal work of the Spirit, is foundational for the Christian faith.