The Lord commands us believers to eat and drink symbols of His broken body and shed blood on the cross as a visual symbolic reminder and assurance of the truth that He suffered and died for us to unite us to His glorified body in heaven, so that we might receive all the benefits of His crucified body and shed blood (John 15:1-5). Christ lives in us to nourish our souls every day. Every day through the Word and prayer we spiritually feed on Christ, trusting in His sacrifice alone for our salvation, and hungering and thirsting to please Him out of thankfulness for our salvation. The daily communion we enjoy in our private lives without the symbols is enjoyed together publicly with the symbols (1 Cor. 10:16-17). As certainly as we swallow the bread and wine and they nourish our body (think of the physical benefits of bread and wine), that is how close Jesus is by His Spirit to strengthen and gladden our soul. As we give Him thanks for His sacrifice we have communion with Him in a spiritual yet real way; and are spiritually nourished.