How was Sai Baba himself involved in the writing of the Sai Satcharitra, based on what the author says in chapter 49?

According to Chapter 49, Sai Baba was not just a subject of the Sai Satcharitra but its primary orchestrator. The author, Hemadpant, explicitly states that Sai Baba Himself is the "composer and the writer" of the book. He explains that whenever he would forget a narrative, Sai would provide the remembrance at the perfect moment. Even when the author intended to rest, an unexpected story would manifest, compelling him to pick up his pen. Hemadpant concludes that the "merciful Sainath, entering into my mind, got His own book written," indicating that he saw himself as a mere instrument for a work that was divinely inspired and directed by Sai Baba.