At a certain point, as I sat in a grand room at the New York Public Library and heard Titanic director James Cameron explain why the bone box in front of him might have held Jesus' remains, I began thinking fondly of Rev. Raymond Brown, one of the 20th century's great historical-Jesus experts. Reading him was no joyride. His footnotes seemed to have footnotes. But that was the point. His scholarship was such that even when one of his books called the virgin birth "unresolved," it got a go-ahead from his Roman Catholic Church.