(28 Aug 1978) RR7835A THE NEW POPE WHAT CATHOLICS THINK The world's 700 million Roman Catholics have a new spiritual leader. He is Pope John Paul, former Patriarch of Venice, a man hardly anyone tipped to fill the exalted post. His responsibilities will be many, the challenges facing him enormous. Should he continue his predecessor's controversial stand on birth control, for example, or seek a new line? Should he give way to the increasing pressures for the church to get involved politically or