What was the reason behind Sai Baba's transition from distributing medicine to giving Udi?

Sai Baba's shift from giving medicine to giving Udi (ash) was a significant evolution in his ministry. Chapter 0 provides a personal explanation from Maharaj himself, which he shared with the writer. He said, "Kaka, 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 statement suggests a profound spiritual shift, where he moved from physical remedies to a method rooted entirely in divine grace and faith, symbolized by the sacred ash, which the text also notes had been beneficial to people even before he stopped giving medicine.