How did Sai Baba's approach to healing people change from his early days in Shirdi?

In his early days in Shirdi, Maharaj's primary method of healing was to provide medicines to those who were ill, and he never accepted any payment for this service. Chapter 0 mentions that he would even personally nurse patients who were not being cared for properly. However, his methods evolved over time. The text explains that he later stopped giving out physical medicines and instead began to offer only Udi, or sacred ash, from his fire, which people found to be effective. Maharaj himself explained this shift to the author, stating, "I used to give medicine to people before. Later, I stopped giving medicine and started saying 'Hari Hari', and while saying Hari Hari, I met Hari," indicating a transition from a physical to a purely spiritual mode of healing.