What are the key themes and stories introduced in Chapter 51 of the Sai Satcharita?

Chapter 51 of the Sai Satcharita serves as an introduction to several important topics. It begins with invocations and praise for Sai Baba, likening his grace to the soothing nature of sandalwood or refreshing rain. The chapter then recaps a discussion from the previous chapter, drawing a parallel between Sai's teachings and the Bhagavad Gita's dialogue between Krishna and Arjuna on the destruction of delusion. As mentioned in Chapter 51, the main narrative focus is then set, promising to tell the story of how Kakasaheb was first established in Shirdi due to his 'rinanubandh' or past-life connections. It also announces that it will narrate three other stories of devotees to soothe the listeners' hearts.