Throughout this century the Letter of James has been viewed consistently as a disjointed set of instructions. Father Haqrtin deviates radically from this approach. He shows that the 'call for perfection' provides a unifying meaning for the letter. Examining the concept of perfectoin against the background of the Greco-Roman world, the Old Testament, and the Septuagint, the author shows that perfection provides a key to define the spirituality of the Letter of James. It offers an understanding of God and of the way one is called 'to be in the the world.' Hartin adopts a fresh approach toward understanding the categories of wisdom, eschatology, and apocalyptic as they illuminate the letter's advise.