What is the central theme of Chapter 34 of the Shri Sai Satcharitra concerning Udi?

Chapter 34 of the Shri Sai Satcharitra continues to explore the glory and miraculous power of Sai Baba's Udi. The central theme is that faith in Sai, combined with the application of his Udi, can cure ailments that are deemed incurable by all forms of conventional medicine. This point is powerfully illustrated through the story of a doctor's nephew from Malegaon, who suffered from a severe bone-cyst. As Chapter 34 explains, after all medical treatments and even surgery failed, his parents turned to Sai Baba. The chapter emphasizes that where human effort and science reach their limit, the divine grace manifested in the Udi provides the ultimate solution, showcasing its supreme healing qualities.