Each week countless church congregations recite the Creed, a statement of belief mainly written 14 centuries ago. But now, theologians seem to put question marks against apparently central and familiar facts; so what does it mean and does it matter? Hans Kiing and Edward Schille beeckx are two of the most controversial Christian thinkers to have contributed to the tremors shaking the Roman Catholic Church in the 20th century. Though their books are read avidly by believers and non-believers alike, they have incurred the wrath of the Vatican . Peter France meets the two so-called ' heretics ' to find out what they think the Christian can believe.