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There is a telling anecdote in Glenn Beck's 2003 memoir about how the cable news host was influenced by the great fantasist Orson Welles. To travel between performances in Manhattan, Beck recounts, Welles hired an ambulance, sirens blaring, to ferry him around town -- not because Welles was ill but because he wanted to avoid traffic.

Most of us would regard this as dishonest, a ploy by the self-confessed charlatan that Welles was. Beck saw it as a model to be emulated. "Welles," he writes, "inspired me to believe that I can create anything that I can see or imagine."