It’s a debate going on for over 500 years. What actually happens during communion? Is there a transformation of substance as Rome demanded? Is there a spiritual presence within the bread and wine as Calvin argued? Is there, as Luther contended, a mysterious physical presence in the elements, “as heat is to iron?” Baptists have most often taken the Memorial View, focusing on the remembrance of the gospel, advocated by Ulrich Zwingli, the Swiss Reformer.