Here is how my textbook from History of Christianity describes the different ways some of the early Reformers used the Bible:
Both Luther and Zwingli were convinced that over the course of centuries Christianity had ceased to be what it was in the New Testament. Luther sought to cleanse it from all that contradicted Scripture. Zwingli went further, holding that only that which had a scriptural foundation should be believed and practiced.
In this description, I hear Luther leaving room for many things Zwingli would reject. For instance, Zwingli prohibited organs in church because they were not biblical. I assume Zwingli would also prohibit electric guitars and video projection technology.
Luther takes Scripture as kind of a form that is pressed down over church practice and belief. Anything that sticks out beyond the form is to be cut away.
Zwingli takes Scripture as more of a blueprint for constructing a church from the ground up. Only things actually in the blueprint can be included.
I wonder how these issues inform United Methodist faith and practice in 2014?