By the act of our will submitting to HIS Righteousness, we receive spiritually, not alimentarily, the Sacrifice GOD made for our cleansing. We break and eat the bread, we sip the wine, as symbols to remember what GOD has done for us by His presence as The Son for our redemption. We do not eat real flesh or drink real blood, but out spirit receives what the sacrifice of HIS body and HIS blood has accomplished for us.
Jesus said to do this sacrament in REMEMBRANCE of an act willed by GOD, received by our turning our will to submit to HIS righteousness. We are the blood bought children Fathered by GOD's Will.