While there is increasing interest in the "theology of the cross, " few people have specific knowledge of what makes it different from other kinds of theology. Gerhard O. Forde here provides an introduction to this theological perspective through an analysis of Luther's Heidelberg Disputation of 1518, the classic text of the theology of the cross. The book first clarifies the difference between a theology of glory and a theology of the cross and explains how each perspective shapes the very nature of being a theologian. The main body of the book provides commentary on the Heidelberg Disputation -- the only complete analysis of this document currently available. Underlying Forde's exposition is the contention that one ought not speak of the theology of the cross as merely another item among a host of theological options; instead, one must pursue what it means to be a theologian of the cross and to look at all things through suffering and the cross.