Introduction When a number of reformers, including Luther and Zwingli, met at the Colloquy of Marburg in 1529 to discuss theological differences, one of the main topics of discussion was the significance of the Lord’s Supper. Luther voiced his disagreement with Zwingli and those of the Reformed confession in the statement “We have a different spirit” (see Luther 1971:70). Years later, when the Swiss theologian, Karl Barth, was teaching in Germany in the 1930s, all professors were required to open