"Stupid people think the world will end because a holy book tells them, a Mayan calendar says so, or Nostradamus promised it would. If they read this book they would know the real ways in which the world might end. But they won't because they are stupid."
"Everybody thinks their mind works in certain ways, but it doesn't. Smart people will read this book and learn what psychologist have learned about the mind and better understand how we think and process things. Stupid people will not read it, however, and they will never know."