What is the underlying theological message in Chapter 34 regarding the limits of human effort versus divine grace?

Chapter 34 uses the story of the doctor's nephew to illustrate the theme of divine grace transcending the limits of human endeavor. The narrative deliberately establishes that the pinnacle of human skill—represented by a degree-holding doctor, expert surgeons, and all known "native and foreign treatments"—was completely helpless against the boy's bone-cyst. This failure of worldly remedies sets the stage for a higher power. As the chapter explains, it was only when all efforts were exhausted that the family turned to Sai Baba. Sai's simple instruction to use Udi, and his reassurance that seeking refuge in him guarantees protection, serves as the core message: faith and surrender to a Sadguru can provide solutions where all human knowledge and effort have reached their absolute limit.