According to the text, what specific event is described in Chapter 15, and what is its purpose?

The text of Chapter 15 explicitly states its own purpose and content. It says, 'In this chapter, the description: the prayer of loving devotees to Sai; Listen to how Sai, being pleased, grants them His vision.' This introduction sets the stage for the central theme of the chapter. The purpose is to illustrate the dynamic between the devotees' heartfelt prayers and Sai's compassionate response. The chapter uses the powerful analogy of a mother cat and her kittens to show that persistent and loving devotion can lead to Sai granting his divine vision, as detailed in the narrative of Chapter 15.