Based on the story of the doctor's nephew, what is the underlying message about the relationship between faith, medicine, and Sai Baba's Udi?

Chapter 34 of the Shri Sai Satcharitra, through the story of the doctor's nephew, illustrates a profound message about the limits of human effort and the power of divine grace. The story highlights that even when the most advanced medical knowledge, represented by the degree-holding doctor and expert surgeons, fails, there is still hope through faith. The family's journey to Shirdi symbolizes a shift from reliance on worldly remedies to seeking refuge in a higher power. Sai Baba's Udi is presented not just as a medicine, but as a vehicle for his grace and blessings, demonstrating that its effectiveness can accomplish what conventional science cannot when all other efforts are exhausted.