What was the initial inspiration for writing the Shri Sai Satcharitra, as mentioned in Chapter 40?

According to Chapter 40, the primary inspiration for writing the Shri Sai Satcharitra came from witnessing one of Sai Baba's daily activities. The author recalls the profound sight of Sai, a saint, sitting and grinding grain. This simple act filled the author's mind with wonder and sparked a "strong desire" to describe all such deeds. The text identifies this event as "the root of this book," explaining that the motivation was a belief that recounting Sai's actions would help destroy the impurities and sins of those who read or hear them. Thus, as Chapter 40 reveals, a seemingly mundane act was the divine catalyst for the entire sacred biography.