In Jonathan Safran Foer's "Extremely Loud and Incredibly Close," the author explores the complex relationship between joy and sorrow. The statement that one cannot protect themselves from sadness without also shielding themselves from happiness highlights a profound truth about human emotions. This suggests that emotional defenses can create a barrier that prevents experiencing the full spectrum of feelings, including both the painful and the joyful moments in life.

The quote emphasizes that to embrace happiness, one must also be willing to confront potential sadness. It reflects the idea that vulnerability is inherent in the human experience, suggesting that true emotional resilience involves accepting both joy and sorrow rather than avoiding one for the sake of the other. This balance is critical for a fulfilling existence where individuals can appreciate life’s highs and lows.