He could find no expression of his love for us more powerful than the expression he made in becoming a man. His blood was poured out for us. The great covenants between God and humanity in the Old Testament were always sealed by the shedding of blood to illustrate their solemnity. If the body of Jesus represents the personal involvement of Jesus with us, his tenderness, love and closeness with us, then his blood is a statement of covenant, and as such is the most far-reaching action he can take in our behalf. When warring nations today enter agreements to end the state of warfare between them, they save thousands of lives by their decision.
Covenants are the means by which fortunes are transferred from one generation to another.
Thus, believers are assured of their inheritance because God made a covenant in the blood of his Son. Because God gave his word the power of sin is broken, its stains cleansed, and our certain future is assured. That is the new covenant, the new agreement between God and man. God has committed himself and he will not change. Let us not trivialize these memories by the way we partake in the Lord's Supper.