Luther and Calvin believed that both the Roman church on the right and the Zwinglian and Anabaptist churches on the left made the Lord's Supper too much a place WHERE BELIEVERS DID THINGS FOR GOD - either by offering Christ to God (Rome) or by offering their deep devotion to God (the Radical Protestants). The main direction of the Supper, in both of these views, was up.
Frederick Dale Bruner, Matthew: The Churchbook Matthew 13-28
anabaptists, communion, eucharist, jesus, lord-s-supper, mass, roman-catholicism, sacrament, zwingli