And when your children ask you, What does this ceremony mean to you? then tell them, It is the Passover sacrifice to the Lord, who passed over the houses of the Israelites in Egypt and spared our homes when He struck down the Egyptians. -Exodus 12:26-27
Christian history begins in the hands of the Hebrew God and a nation of Jews. Jesus was always clear that He did not come to negate that history, but to fulfill its prophecy. He honored and obeyed the law, the true interpretation of Gods original covenant, until He would write the new covenant in His own blood the blood of the Passover Lamb. The Passover meal commemorated Gods grace in saving the first born of the Israelites, His children in bondage. The final act that would set them free was the sacrifice of a perfect lamb, covering the door of the house with its precious blood.
Jesus final act, as He ushered in the new covenant, was to offer Himself as the sacrificial lamb- the first born of God, shedding His blameless blood to atone for the sins of all children who would cover the door of their hearts with it and claim its protection from spiritual death. An act that continues to free us from our bondage today. From then on, the Passover meal became what Christians would practice as Communion no longer a once a year celebration, but an every day reminder of the grace that has saved us and set us free.
For whenever you eat this bread and drink this cup, you proclaim the Lords death until He comes. 1 Corinthians 11:26