The reading from the Book of Exodus recalls that our holy communion is a communion in the New Covenant, in the Blood of Christ. When Moses presented to his people the commands and ordinances of the Lord, they accepted and committed themselves to observing them all. In recognition of this, Moses arranged for a sacrifical offering to be made. He then poured some of the blood of the sacrificed animals over the altar, and sprinkled the rest over the assembled people. This was a symbol of uniting together, in a kind of pact or treaty or agreement, both the people and the Lord, with a commitment to each other on both sides. Christ is the "new Moses", ratifying a new contract or covenant with the Father in His sacrifice of Himself on the Cross. It is His own blood which is the sign of this new commitment. When we receive the Body and Blood of Christ we are thus making a commitment that we accept all the Lord's commands and ordinances, with all their obligations towards God and His creation, towards other people and ourselves. On God's side, His love for us is constant. But on my side, how does my taking part in the Eucharist and communion express my receiving of His law and my commitment to Him?