What is the main theme of Chapter 15, and what specific analogies are used to illustrate it?

Chapter 15 serves as an introductory prayer, describing how loving devotees beseech Sai and how he, in turn, graciously grants them his vision. The author states that only those with great merit attain the 'darshan' of Sai, which frees them from worldly afflictions. As detailed in Chapter 15, two primary analogies are employed. The first compares the listeners to a vast ocean that accepts all rivers, whether pure or muddy, symbolizing the grace the listeners should show the narrator. The second, more intimate analogy, likens the relationship between Sai and his devotees to that of a mother cat and her kittens, where the devotees' persistent love ultimately elicits a flow of grace from the Guru.