Describe Maharaj's own explanation for why he stopped giving medicine and started giving Udi instead.

The provided text explains Maharaj's transition from a provider of physical medicine to a bestower of sacred ash, or Udi. Initially, he was known for giving medicines freely and even personally nursing the sick. However, he later stopped this practice. As recounted in Chapter 0, Maharaj personally explained this shift to the writer, whom he affectionately called "Kaka." 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 his work evolved from a physical to a purely spiritual or faith-based form of healing.