The quote from James Clavell's "Shogun," stating "A wise man prepares for treachery," emphasizes the importance of foresight and caution in human interactions. It suggests that wisdom comes from understanding the potential for betrayal and deception in relationships, whether personal or political. Therefore, being prepared for treachery allows one to safeguard themselves against unforeseen challenges and conflicts.

This perspective aligns with the broader themes in "Shogun," where characters must navigate complex social and political landscapes in feudal Japan. The idea is that a strategic approach to life, one that acknowledges the possibility of betrayal, can lead to greater resilience and success in overcoming adversities.