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Concerning Christian Liberty
So it is with the works of a believer. Being by his faith replaced afresh in paradise and created anew, he does not need works for his justification, but that he may not be idle, but may exercise his own body and preserve it. His works are to be done freely, with the sole object of pleasing God. Only we are not yet fully created anew in perfect faith and love; these require to be increased, not, however, through works, but through themselves.
A bishop, when he consecrates a church, confirms children, or performs any other duty of his office, is not consecrated as bishop by these works; nay, unless he had been previously consecrated as bishop, not one of those works would have any validity; they would be foolish, childish, and ridiculous. Thus a Christian, being consecrated by his faith, does good works; but he is not by these works made a more sacred person, or more a Christian. That is the effect of faith alone; nay, unless he were previously a believer and a Christian, none of his works would have any value at all; they would really be impious and damnable sins.
True, then, are these two sayings: "Good works do not make a good man, but a good man does good works"; "Bad works do not make a bad man, but a bad man does bad works." Thus it is always necessary that the substance or person should be good before any good works can be done, and that good works should follow and proceed from a good person. As Christ says, "A good tree cannot bring forth evil fruit, neither can a corrupt tree bring forth good fruit" (Matt. vii. 18). Now it is clear that the fruit does not bear the tree, nor does the tree grow on the fruit; but, on the contrary, the trees bear the fruit, and the fruit grows on the trees.
As then trees must exist before their fruit, and as the fruit does not make the tree either good or bad, but on the contrary, a tree of either kind produces fruit of the same kind, so must first the person of the man be good or bad before he can do either a good or a bad work; and his works do not make him bad or good, but he himself makes his works either bad or good.
We may see the same thing in all handicrafts. A bad or good house does not make a bad or good builder, but a good or bad builder makes a good or bad house. And in general no work makes the workman such as it is itself; but the workman makes the work such as he is himself. Such is the case, too, with the works of men. Such as the man himself is, whether in faith or in unbelief, such is his work: good if it be done in faith; bad if in unbelief. But the converse is not true that, such as the work is, such the man becomes in faith or in unbelief. For as works do not make a believing man, so neither do they make a justified man; but faith, as it makes a man a believer and justified, so also it makes his works good.