How do we know that Christ is the messenger of the covenant?

Malachi 3:1 proclaims, 'Behold, I will send my messenger, and he shall prepare the way before me.' This prophecy finds its fulfillment in Christ, who is both the messenger and the fulfillment of the covenant. In the New Testament, John the Baptist explicitly identifies himself as the forerunner who prepares the way for Christ. Through His life, death, and resurrection, Jesus establishes the New Covenant, ensuring that His chosen ones are redeemed and brought into fellowship with God. This understanding is vital as it emphasizes Christ’s role as the central figure in God’s redemptive plan.