For many of our contemporaries, God is something of the past, and to b e agnostic is the solution for a developed and progressive world. Befo re such situation, this book wants to help Christians, who come from a tradition of twenty centuries, to speak of God keeping in mind the mo ment in which live, and to show to non believers that to believe is so mething reasonable and up-to-date and that, beyond prejudices, faith i s not alienating but rather it is in itself a deep and liberating opti on.