What Is the Lutheran Confession? A Guide to the Book of Concord

When Lutherans talk about "the confessions," they mean a specific collection of documents compiled in 1580 called the Book of Concord. These writings — produced between 1529 and 1577 — define what Lutherans believe, teach, and confess about the Christian faith. Understanding the Book of Concord is essential for understanding Lutheranism.

What Is the Book of Concord?

The Book of Concord is a collection of eleven documents adopted on June 25, 1580 — the 50th anniversary of the Augsburg Confession — by Lutheran princes, nobles, and theologians. It was compiled to end decades of internal theological disputes among Lutherans following Martin Luther's death in 1546. The Book of Concord represents the Lutheran answer to the question: "What do we actually believe?"

The Documents of the Book of Concord

The Book of Concord contains three ecumenical creeds (Apostles', Nicene, and Athanasian) — documents Lutherans share with the whole church. It then includes specifically Lutheran documents: Luther's Small Catechism (1529) and Large Catechism (1529), written to teach the basics of Christian faith. The Augsburg Confession (1530), written by Philip Melanchthon, was the first formal Lutheran statement of doctrine, presented to Holy Roman Emperor Charles V. Its companion, the Apology of the Augsburg Confession, defended it against Roman Catholic objections.

Later documents include the Smalcald Articles (1537), written by Luther himself as a sharp statement of what could and could not be conceded to Rome. The Treatise on the Power and Primacy of the Pope (by Melanchthon) and the Formula of Concord (1577) round out the collection, with the Formula resolving internal disputes on issues like free will, grace, the Lord's Supper, and Christ's presence.

Why the Confessions Matter

Lutheran pastors and teachers are ordained to preach and teach "in accordance with" the confessions. This means the Book of Concord serves as the doctrinal standard by which Lutheran preaching, teaching, and practice are measured — subordinate to Scripture, but authoritative as a faithful summary of what Scripture teaches. A church that ignores or contradicts the confessions has, by definition, departed from Lutheran identity.

Quia vs. Quatenus Subscription

Lutheran churches subscribe to the Book of Concord in one of two ways. "Quia" (Latin: "because") subscription means affirming the confessions because they faithfully teach what Scripture teaches. "Quatenus" ("insofar as") subscription only commits to them where they happen to agree with Scripture, leaving open the possibility of disagreement. Confessional Lutheran bodies — the LCMS, WELS, and ELS — require quia subscription from their clergy.

The Catechisms: Where Most Lutherans Start

For most Lutherans, the Small Catechism is the entry point to confessional Lutheran theology. Luther designed it in 1529 as a household teaching tool — short, clear, and organized around the Ten Commandments, the Creed, the Lord's Prayer, Baptism, Confession, and the Sacrament of the Altar. It has been used to prepare Lutheran youth for confirmation for nearly 500 years and remains the most widely used summary of Lutheran doctrine in the world.

The Lutheran Confession is not a relic of the sixteenth century. It is a living doctrinal heritage that shapes Lutheran worship, preaching, catechesis, and care of souls today. Understanding it is the first step toward understanding what makes Lutheranism distinctly Lutheran.