As we see in his catechism, Luther expounded the Ten Commandments, freely supplementing and applying them in agreement with biblical admonitions. The Commandments are hence not only a mirror in which we recognize sin, although they retain this function for the Christian; they are a much-needed and wholesome instruction in that which God expects from us by way of good works. In contrast to the opinion of later Lutheran orthodoxy and of the Reformed tradition, there is, according to Luther, no so-called