Jesus' best-known mandate--after perhaps the mandate to love God and neighbor--was given at the Last Supper just before his death: Do this in memory of me. Indeed a case can be made that to do this is the source and summit of the way Christians carry out Jesus' love-mandate. Of course Christians have debated what it means to do this and these debates have all too often led to divisions within and between them--debates over leavened and unleavened bread reception of the cup real presence and sacr