66] These and like errors, one and all, we unanimously reject as contrary to the clear Word of God, and by God's grace abide firmly and constantly in the doctrine of the righteousness of faith before God, as it is embodied, expounded, and proved from God's Word in the Augsburg Confession, and the Apology issued after it.
67] Concerning what is needful furthermore for the proper explanation of this profound and chief article of justification before God, upon which depends the salvation of our souls, we direct, and for the sake of brevity herewith refer, every one to Dr. Luther's beautiful and glorious exposition of the Epistle of St. Paul to the Galatians.
Formula of Concord, Article III, The Righteousness of Faith. Book of Concord.