It is a singularly unpleasant thought that a book about Holy Communion is more likely to produce disagreement and controversy than one written on almost any other Christian subject. It seems a truly terrible thing that this Sacred Appointment, which was surely meant to unite, in actual practice divides Christians more sharply than any other part of their worship. Christians of various denominations may, and frequently do, work together on social projects, they may study the Scripture together, and they may ... pray together. But the moment attendance at the Lord's Table is suggested, up go the denominational barriers...