What does Chapter 40 say about the inspiration behind writing the Shri Sai Satcharitra?

Chapter 40 reveals that the very root of the Shri Sai Satcharitra was a strong desire in the author's mind to describe Sai Baba's deeds. A specific and wondrous image is mentioned as the primary inspiration: the sight of Sai Baba, a saint, setting up a grinding stone, spreading his legs, and grinding grain. This act filled the author's mind with wonder and sparked the idea that describing all such deeds would destroy impurities. The chapter clarifies this was Sai's own inspiration, approved by Him for the devotees' welfare.