Cardinal Waler Kasper is a distinguished theologian who has been a colleague of Cardinal Ratzinger, Karl Rahner and Hans Kung at the Universtities of Munster and Tubingen. Kasper now heads the Vatican's Ponitifical Council for Promoting Christian Unity, with the specific task of fostering relations between the Catholic Church and the other Christian Churches and Eccesiastical communities. By any reckoning, Kasper is a key leader in the eccumenical movement today. In this new book, he outlines his vision for the unity of Christian Churches. A man with an open mind, Kasper covers one of the major responsibilities of the contemporary Catholic Church. His perspective of the uniqueness of the Catholic Church and its magisterium is presented here as a modern inquiry into the nature of truth. His views are enlightened and engaging, and reflect the important role of dialogue as understood by the Catholic Church, which must also listen to other traditions and learn from them. But Kasper also realises that the cause of unity is exceptionally difficult at the present time.Dialogue is often challenged by developments between and within Christian communions and obstructed by historical tensions. This book will command quite exceptional interest. Many will read it in the hope that the thought of this renowned, open-minded Church leader may give hope to people of all traditions that they may learn to understand Jesus's injucntion - 'that they may be one'.