According to Chapter 40, what inspired the creation of this book, and how is God's pleasure described in relation to it?

Chapter 40 reveals that the inspiration for the Shri Sai Satcharitra arose from witnessing Sai's divine actions. Specifically, the sight of the saint grinding grain in Shirdi sparked a 'strong desire' in the author's mind to describe all such deeds, believing this act would destroy impurities. The chapter further supports this motivation by explaining that God (Hari) Himself is pleased, even more than by His own praises, when someone 'sings the praises of His devotees or describes the qualities of the devotees.' To lend weight to this claim, Chapter 40 even cites the Bhavishyottara Purana, where Shiva (Tripurari) affirms this very point, confirming that celebrating saints is a highly regarded spiritual practice.