Formula of Concord, Solid Declaration, III. The Righteousness of Faith
This article concerning justification by faith (as the Apology says) is the chief article in the entire Christian doctrine, without which no poor conscience can have any firm consolation, or can truly know the riches of the grace of Christ, as Dr. Luther also has written: If this only article remains pure on the battlefield, the Christian Church also remains pure, and in goodly harmony and without any sects; but if it does not remain pure, it is not possible that any error or fanatical spirit can be resisted. (Tom. 5, Jena, p. 159.)
