What is the significance of the term 'rinanubandh' as mentioned in Chapter 51 in relation to Kakasaheb?

In Chapter 51, the term 'rinanubandh' is used to describe the profound, karmic connection Kakasaheb had with Shirdi and Sai Baba. The narrator promises to narrate the "entire history of his bond of past lives (rinanubandh) with Shirdi and his firm relationship with Sai." This implies that Kakasaheb's arrival in Shirdi was not a chance event but a result of a pre-existing spiritual debt or bond from previous lifetimes. As Chapter 51 explains, it is due to the merits of past lives that one obtains the grace of the Supreme Lord, which in turn leads to meeting a Sadguru and strengthening one's spiritual bliss.