“If the great, sublime doctrine called the forgiveness of sins is correctly understood, it makes one a genuine Christian and gives one eternal life. This is the very reason why it must be taught in Christendom with unflagging diligence and without ceasing, so that people may learn to understand it plainly, clearly, and discriminatingly. For to do so is the one, supreme, and most difficult task of Christians. As long as we live here below, we shall have enough to do to learn this doctrine. No one need look for anything new, anything higher, and anything better.”
–Martin Luther, What Luther Says: An Anthology, comp. Ewald M. Plass (St. Louis: Concordia Publishing House, 1959), entry no. 1544, 515.