Luther on faith and works: The Inner Man

One thing, and one alone, is necessary for life, justification, and Christian liberty; and that is the most holy word of God, the Gospel of Christ.
-Martin Luther


We first approach the subject of the inward man, that we may see by what means a man becomes justified, free, and a true Christian; that is, a spiritual, new, and inward man. It is certain that absolutely none among outward things, under whatever name they may be reckoned, has any influence in producing Christian righteousness or liberty, nor, on the other hand, unrighteousness or slavery. This can be shown by an easy argument.

What can it profit the soul that the body should be in good condition, free, and full of life; that it should eat, drink, and act according to its pleasure; when even the most impious slaves of every kind of vice are prosperous in these matters? Again, what harm can ill-health, bondage, hunger, thirst, or any other outward evil, do to the soul, when even the most pious of men and the freest in the purity of their conscience, are harassed by these things? Neither of these states of things has to do with the liberty or the slavery of the soul.

And so it will profit nothing that the body should be adorned with sacred vestments, or dwell in holy places, or be occupied in sacred offices, or pray, fast, and abstain from certain meats, or do whatever works can be done through the body and in the body. Something widely different will be necessary for the justification and liberty of the soul, since the things I have spoken of can be done by any impious person, and only hypocrites are produced by devotion to these things. On the other hand, it will not at all injure the soul that the body should be clothed in profane raiment, should dwell in profane places, should eat and drink in the ordinary fashion, should not pray aloud, and should leave undone all the things above mentioned, which may be done by hypocrites.

And, to cast everything aside, even speculation, meditations, and whatever things can be performed by the exertions of the soul itself, are of no profit. One thing, and one alone, is necessary for life, justification, and Christian liberty; and that is the most holy word of God, the Gospel of Christ, as He says, "I am the resurrection and the life; he that believeth in Me shall not die eternally" (John xi. 25), and also, "If the Son shall make you free, ye shall be free indeed" (John viii. 36), and, "Man shall not live by bread alone, but by every word that proceedeth out of the mouth of God" (Matt. iv. 4).