One of the great, and often ignored, contributions of the Reformation was to return worship to the people. Somehow, many Protestants have got the idea that prayer books, with written prayers, responsive readings, creeds and the like are Roman Catholic and medieval. Nothing could be further from the truth. Prayer books were a product of the Reformation and they were written so that the congregation could participate fully in the act of worship.
—Peter Leithart, “Transforming Worship” Foundations 38 (Spring ’97):30