"Correct, Manuel. A revolutionist must keep his mind free of worry or the pressure becomes intolerable." "I don't believe a word of it," Wyoh added. "We've got Mike and we're going to win! Mike dear, you say we're going to fight Terra--and Mannie says that's one battle we can't win. You have some idea of how we can win, or you wouldn't have given us even one chance in seven. So what is it?" "Throw rocks at them," Mike answered. "Not funny," I told him. "Wyoh, don't borrow trouble. Haven't even settled how we leave this pooka without being nabbed. Mike, Prof says nine guards were killed last night and Wyoh says twenty-seven is whole bodyguard. Leaving eighteen. Do you know if that's true, do you know where they are and what they are up to? Can't put on a revolution if we dasn't stir out."

— The Moon Is a Harsh Mistress by Robert A. Heinlein, Lloyd James (Page 53 - 54)