“Whoso then can rightly judge between the law and the Gospel, let him thank God, and know he is a right divine…This place, touching the difference between the law and the Gospel, is very necessary to be known, for it containeth the sum of all Christian doctrine. Wherefore let all who love and fear God, diligently learn to discern the one from the other, not only in words, but in deed and in practice; that is to say, in heart and conscience.” --Martin Luther