The Lord’s Supper shows us that dying for sinners was the great work that Jesus came to do. Neither his birth nor his earthly ministry would have come to anything had he not submitted to death on the cross.
So why should you proclaim it? The psalmist David said, “You prepare a table before me in the presence of my enemies…” (Psalm 23:5) The Lord’s table is prepared for you in the presence of your enemies because when you partake of the bread and wine, you will see your enemies tremble and scatter! Why? Because when you proclaim the Lord’s death through the Holy Communion, you are reminding the devil and his cohorts of their humiliating defeat at Calvary’s cross! (Colossians 2:15)