It is difficult or impossible to use the Lutheran idea of \u27Law and Gospel\u27 as a guide to the theological content of the Bible. The idea has poor biblical support and accounts for a number of ambiguities in Lutheran theology relating to sanctification (including simul justus, \u27law always accuses\u27, inabilities to understand the Sermon on the Mount as a message of discipleship). Furthermore, the idea has received quite different interpretations from various Lutheran theologians. However, one fruitful approach is to use \u27Law and Gospel\u27 as a guide to measure the impact of a text or message on a specific audience, as is demonstrated with Luther\u27s interpretation of the Sermon on the Mount. But even so, \u27Law and Gospel\u27 must be supplemented by the important category of \u27discipleship\u27 and other categories in order to encompass the possibilities of the Bible\u27s message
