Why does the author interrupt the main story to talk about how he was named Hemadpant? It seems like an unnecessary diversion.

The author explains this diversion within Chapter 2. After quoting Sai Baba's advice to "not engage in dualistic explanations," he is reminded of a promise he made to explain the origin of his name, "Hemadpant." The text clarifies that this "sub-story within the story" is included to satisfy the natural curiosity of listeners who see the name at the end of every chapter. The author also notes that this inspiration to tell the story of his naming came from Sai himself and that its appropriateness will be revealed before the main narrative of Sai's life continues.