EUCHARIST means "thanksgiving" and early became a synonym for Holy Communion. The Eucharist is the center of worship in the Orthodox Church. Because Jesus said of the bread and wine at the Last Supper, "This is my body," "This ... is ... my blood," and "Do this in remembrance of Me" (Luke 22:19, 20), His followers believe-and do-nothing less. In the Eucharist, we partake mystically of Christ's Body and Blood, which impart His life and strength to us. The celebration of the Eucharist was a regular part of the Church's life from its beginning. Early Christians began calling the Eucharist "the medicine of immortality" because they recognized the great grace of God that was received in it.