What role does the Old Testament play in understanding the New Covenant?

The Old Testament is foundational for understanding the New Covenant as it provides the context and foreshadowing of Christ's work. As Hebrews explains, the sacrifices and priesthood of the Old Testament were insufficient to make people perfect, but they pointed to Christ, who fulfills every requirement. The prophecies of the Old Testament regarding the coming Messiah and His sacrificial death serve as a backdrop for the New Testament narrative, revealing how Jesus completes God’s plan for redemption. The New Covenant, secured by Christ’s blood, brings to fruition God’s promises made to His people.