The truth of the new covenant is confirmed by its fulfillment in Christ, as detailed in the New Testament, particularly in the letters of Paul and the book of Hebrews.
The validity of the new covenant is affirmed through the fulfillment of Old Testament prophecies in the New Testament. Jesus Christ, as the mediator of this covenant, fulfilled every expectation set forth in the Old Testament regarding the coming Messiah. Hebrews 8 and 10 reiterate the promises of Jeremiah, showcasing how Christ's sacrificial death and resurrection established the new covenant. His righteousness is imputed to believers, fulfilling the condition of the covenant solely through Him, eliminating the reliance on human effort. This not only demonstrates the promise of forgiveness but also provides assurance that every true believer shall ultimately know God intimately, as God has promised to write His laws on their hearts.
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