The real wisdom here isn't about paranoia—it's about understanding that your adversaries hold information you desperately need. By paying attention to those who oppose you, you learn what weaknesses they perceive, what moves they anticipate, and where your blind spots might be. A business rival, for instance, often teaches you more about your market position than cheerleading from your own team ever could, simply because they're hunting for the cracks in your strategy. What Puzo captures is that proximity to opposition breeds clarity.