Can you explain Maharaj's transition from giving out medicine to his later practices?

Maharaj's methods of helping people evolved over time. Chapter 0 explains that he initially used to give medicine to people for their ailments. He later recounted this shift to the writer, whom he called 'Kaka,' 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." This indicates a transition from physical remedies to a practice centered on chanting the divine name. Alongside this, he also gave out Udi, or sacred ash, which was believed to have healing properties.