From all this it is easy to perceive on what principle good works are to be cast aside or embraced, and by what rule all teachings put forth concerning works are to be understood. For if works are brought forward as grounds of justification, and are done under the false persuasion that we can pretend to be justified by them, they lay on us the yoke of necessity, and extinguish liberty along with faith, and by this very addition to their use they become no longer good, but really worthy of condemnation. For such works are not free, but blaspheme the grace of God, to which alone it belongs to justify and save through faith. Works cannot accomplish this, and yet, with impious presumption, through our folly, they take it on themselves to do so; and thus break in with violence upon the office and glory of grace. We do not then reject good works; nay, we embrace them and teach them in the highest degree. It is not on their own account that we condemn them, but on account of this impious addition to them and the perverse notion of seeking justification by them. These things cause them to be only good in outward show, but in reality not good, since by them men are deceived and deceive others, like ravening wolves in sheep's clothing. Now this leviathan, this perverted notion about works, is invincible when sincere faith is wanting. For those sanctified doers of works cannot but hold it till faith, which destroys it, comes and reigns in the heart. Nature cannot expel it by her own power; nay, cannot even see it for what it is, but considers it as a most holy will. And when custom steps in besides, and strengthens this pravity of nature, as has happened by means of impious teachers, then the evil is incurable, and leads astray multitudes to irreparable ruin. Therefore, though it is good to preach and write about penitence, confession, and satisfaction, yet if we stop there, and do not go on to teach faith, such teaching is without doubt deceitful and devilish. For Christ, speaking by His servant John, not only said, "Repent ye," but added, "for the kingdom of heaven is at hand" (Matt. iii. 2). For not one word of God only, but both, should be preached; new and old things should be brought out of the treasury, as well the voice of the law as the word of grace. The voice of the law should be brought forward, that men may be terrified and brought to a knowledge of their sins, and thence be converted to penitence and to a better manner of life. But we must not stop here; that would be to wound only and not to bind up, to strike and not to heal, to kill and not to make alive, to bring down to hell and not to bring back, to humble and not to exalt. Therefore the word of grace and of the promised remission of sin must also be preached, in order to teach and set up faith, since without that word contrition, penitence, and all other duties, are performed and taught in vain.