From the second century on Christians have expressed the biblical faith in summaries that served to identify the church’s public message. The Greek word symbol--a technical word for creed--identified the function of such summaries of the church’s teaching as its identifying statement of belief, purpose, and mission. The Apostles’ and Nicene Creeds both offered believers guidance for public instruction and witness and also served to regulate and evaluate the public theology of the church’s teachers. They demarcated lines between errors that had attacked the faith and biblical truth.
~Robert Kolb and Timothy Wengert, “Editors’ Introduction to the Book of Concord” in The Book of Concord: The Confessions of the Evangelical Lutheran Church, 1.






