How do we know that Jesus fulfilled the promises of God?

We know that Jesus fulfilled the promises of God through His incarnation, death, and resurrection, as presented in the New Testament. John 6:37 tells us that Jesus will not lose any whom the Father gives Him, confirming the fulfillment of God's redemptive plan. Just as God appointed Saul and subsequently David as kings in Israel, He appointed Jesus to be the King of Kings, establishing His eternal kingdom. The empty tomb serves as the ultimate sign of God's faithfulness, assuring believers that Christ’s sacrifice was sufficient for salvation. Therefore, in trusting in Jesus, we see the culmination of the covenantal promises that God made throughout history, affirming that God's word is reliable and His grace is abundant for those who believe.