He was a fattish but active man of paralyzing stupidity, a mass of imbecile enthusiasm – one of those completely unquestioning, devoted drudges on whom, more even than on the Thought Police, the stability of the Party depended.
– George Orwell
1984. Part 1, Chapter 2. Tom Parsons, a devout member of the Party and proud of his spying childen, who eventually betray him.