What is the primary theme and central analogy presented in Chapter 15 of the Shri Sai Satcharitra?

Chapter 15 primarily explores the relationship between Sai and His devotees, detailing how He grants His vision to those who approach with loving persistence. The chapter introduces its theme by stating it will describe the prayer of loving devotees and how Sai, being pleased, grants them His vision. The central analogy used to illustrate this, as found in Chapter 15, is that of a mother cat and her kittens. The kittens eagerly run to their mother, who may initially seem annoyed but then relents due to their love, allowing them to nurse. This beautifully illustrates how Sai responds to the unwavering love of His followers, ultimately showering them with grace.