What specific imagery involving Sai Baba is mentioned in Chapter 40, and what is its stated significance to the creation of the book?

Chapter 40 recalls the powerful image of Sai Baba, a saint, setting up a grinding stone, spreading His legs, and grinding grain. This act is presented as a foundational inspiration for the Shri Sai Satcharitra itself. The author notes that witnessing this filled his mind with wonder and sparked a 'strong desire' to describe all such deeds. The significance, as explained in the chapter, is the belief that recounting these divine actions and the qualities of devotees serves to destroy impurities and sins. It is even mentioned that God (Hari) is more pleased by the praise of His devotees than by praises of Himself, lending profound purpose to the author's task.