Christianity is the kingdom of priests God envisioned in Exodus 19. Its purpose is to mediate the blessings of God to the world. As we partake of the body and the blood of Christ in communion, we imitate the Aaronic priests’ consumption of portions of certain Israelite sacrifices. Communion strengthens and empowers us to bring the blessings of righteousness, peace, and joy to the nations of the world.
Psalm 2 describes an idealized Israelite king as God’s Messiah. Jesus radically reinterpreted this idealization when he chose to exercise his Messianic authority through service, self-sacrifice, and trust in God. The Church, as co-heirs with Christ, now share in the Messianic privileges and responsibilities.