. . . [Luther] sees the Christian life as one fueled by the reading and hearing of this Word, primarily in a corporate context. This is a great antidote to a number of perennial problems for Christians. First, there is the “need” for something more than the Bible. The success of books that offer something spectacular–whether accounts of dying and coming back to the land of the living or low-key claims to special, extra words from God–shows that the Christian world loves something out of the ordinary.
Luther would respond that such things are absolutely unnecessary, for what we need is the Word of God in the humble, mundane form that he has given it to us. Why read a book on a child who claims to have died and come back when one can read the Gospels and find there God, clothed in frail human flesh, dying and rising again? Why desire further, special words from God when the great Word of God, Christ himself, is offered to every individual as the Bible is read, preached, and sometimes applied individually through the confessional? Luther would see the market for such books as a function of our striving to be theologians of glory, unsatisfied with how God has chosen to reveal himself to be toward us, and always craving to make God conform to our expectations of what we need.
– Carl Trueman, Luther on the Christian Life, 113-114.