This Handbook offers practical suggestions for implementing spiritual ecumenism, the heart of all efforts to re-unite divided Christians. Grounded in the documents of the Second Vatican Council, as well as the encyclical Ut Unum Sint and the Catechism of the Catholic Church, it is written for anyone who values deeply the restoration of Christian unity, especially those responsible for promoting it at various levels of Church life. "Cardinal Kasper's handbook distills the wonderful possibilities of common prayer and witness available to Christians of disparate communions. As a tool of applied ecumenism, this clearly written text provides pastors and teachers with practical ways of engaging others with the mandate to seek unity within the Body of Christ." Rev. James Massa Executive Director of the Secretariat for Ecumenical and Religious Affairs, USCCB