“In this epistle, therefore, Paul is concerned to instruct, comfort, and sustain us diligently in a perfect knowledge of this most excellent and Christian righteousness. For if the doctrine of justification is lost, the whole of Christian doctrine is lost.”
–Martin Luther, Luther’s Works, Vol. 26: Lectures on Galatians, 1535, Chapters 1-4 (ed. Jaroslav Jan Pelikan, Hilton C. Oswald, and Helmut T. Lehmann; vol. 26; Saint Louis: Concordia Publishing House, 1999), 26: 9.