What is the overarching message about faith and worldly remedies presented in Chapter 34 through the story of the Hadyavran cure?

The story in Chapter 34 conveys a powerful message about the limits of worldly remedies and the supreme power of faith in a Sadguru. The chapter details how a degree-holding doctor, his expert colleagues, and all known native and foreign treatments, including surgery, were completely helpless against the boy's bone-cyst. It was only when all these efforts were exhausted and the family turned to Sai Baba with complete devotion as a last resort that a solution was found. As Chapter 34 narrates, Sai's simple instruction to apply Udi was the key. This illustrates that where human knowledge and science reach their limit, unwavering faith in a saint like Sai can bring about miraculous healing and overcome seemingly insurmountable calamities.