Quite simply, three of the most important and well-known confessions of the Reformed faith. The Augsburg Confession is the earliest of the three and is the primary confession of the Lutheran Church. The Heidelberg Catechism was a response written by Zacharias Ursinus and consists of 129 questions and answers. The Westminster Confession is the best known and begins with "What is the chief end of man? Man's chief end is to glorify God, and enjoy Him forever."