What Does It Mean to “Do This”?

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 presen