How does the story of Nana Chandorkar and the devotee's sick daughter illustrate the relationship between Udi, faith, and healing?

The incident with Nana Chandorkar profoundly illustrates that sincere faith is the most critical component of healing, even more so than the physical substance of Udi. As recounted in Chapter 33, a father, distressed about his daughter's glandular fever, requested Udi from Nana. Finding himself without any, Nana did not hesitate. He picked up road clay, offered a prayer to Sai, and the healing occurred at that very moment. The text explicitly states that the daughter's fever began to subside from the precise time Nana made his prayer with the particle of clay. This demonstrates that the ultimate power lies in the prayer and faith directed towards Sai, with Udi, or in this case clay, serving as a powerful medium for that faith.