“Since ‘Angels & Demons’ takes place mainly in the Vatican, and is festooned with the rites and ornaments of Roman Catholicism, I might as well begin with a confession. I have not read the novel by Dan Brown on which this film (directed, like its predecessor, ‘The Da Vinci Code,’ by Ron Howard) is based. I have come to believe that to do so would be a sin against my faith, not in the Church of Rome but in the English language, a noble and beleaguered institution against which Mr. Brown practices vile and unspeakable blasphemy.”