The greatest living Protestant theologian retired from his professorship at the University of Basel last year, presumably with nothing to do but listen to Mozart records and finish the 13th volume of his masterwork, Church Dogmatics. But at the age of 77, Karl Barth (TIME cover, April 20, 1962) has found himself so busy that he wonders if he will ever finish the book at all. Two evenings a week he holds a trilingual "colloquia" with divinity students in the nearby Bruderholz Restaurant. He keeps up...