If there is one fact that has stood out in the human history of Christianity it is this -- that the Church has lied a lot. A ""lie"" is defined as a deliberate distortion of reality, or as a deliberate non-recognition of reality. And it is in this sense that Father Kung sees the hope of the Church of the future to lie in its devotion to truthfulness, i.e., to reality, as opposed to a penchant for wishfulfillment. In that context, he suggests specific lines of development: the implementation of the spirit of the Conciliar declarations; a renewal of theology in terms consonant with the modern world; a thoroughgoing reform of canon law, so that a new Codex may be a vital and changing corpus rather than, as in the past, a static corpse; a structural reform of the Church, from the Curia to the parish organizations. Kung gives special attention, too, to the exigencies of truth with respect to ecumenism, reasoning on the basis of reforms that are as inescapable as they are revolutionary. Father Kung has never been a man to disguise the iron hand of reason in the velvet glove of rhetoric, and in this book he preaches, at least by implication, a revolution in terms that will offend many but wall inspire most. This is probably Kung's most on-target work to date.