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

Chapter 15's central theme is the power of loving devotion in winning the Guru's grace. The text explains that it will describe the prayer of loving devotees to Sai and how Sai, being pleased, grants them His vision. To illustrate this dynamic, the chapter introduces a memorable analogy of a mother cat and her kittens. Just as kittens persist in clinging to their mother with love, even if she initially growls, until her milk flows and she yields with affection, so too should devotees persist in their loving pursuit of the Guru. As described in Chapter 15, this loving persistence ultimately melts the Guru's heart and brings forth grace.