Introduction: secular awareness and the dark night of the church, by A. Morawska.--The church and mankind, by E. Schillebeeckx.--Man and the sacraments, by B. Bro.--The ecclesial reality of the other churches, by G. Baum.--Intercommunion, by S. Butler.--Is the Catholic Church relevant today? By C. Davis and J. L. McKenzie.--Are you a Catholic? By F. Sontag.--What is the essence of apostolic succession? By H. Kیng.--Bishops, presbyters, and priests in Ignatius of Antioch, by J. F. McCue.--The Petrine office, by H. Kیng.--Public opinion in the church, by S. E. Kutz.--Vatican I, infallibility, and doctrinal renewal, by G. Baum.--Dogma as an ecumenical problem, by A. Dulles.--Schism of consciousness, by R. Ruether.--Church as movement, by G. Baum