What is the primary message of Chapter 34 regarding the power of Udi?

Chapter 34 of the Shri Sai Satcharitra continues the narration from the previous chapter on the glory and greatness of Udi. Its primary message is to illustrate the profound, miraculous healing power of Sai's sacred ash, even in cases deemed hopeless by medical science. The chapter presents the story of a doctor's nephew from Malegaon who suffered from a terrible bone-cyst that could not be cured by any native or foreign treatments, including surgery. As described in Chapter 34, after all remedies were exhausted, the family sought Sai Baba's help as a last resort. Baba, the embodiment of compassion, simply gave them Udi to smear on the wound, demonstrating that faith and the Guru's grace, channeled through Udi, can uproot immense pain and cure incurable diseases.