Based on Chapter 51, what is the significance of 'rinanubandh' in a devotee's journey to Sai Baba?

Chapter 51 introduces the concept of 'rinanubandh' as a crucial factor in a devotee's connection to the Sadguru. The chapter explicitly states that it will narrate the entire history of Kakasaheb's "bond of past lives (rinanubandh) with Shirdi" and his firm relationship with Sai. This implies that the connection between a devotee and the Guru is not a random occurrence but is pre-ordained by karmic ties from previous existences. According to the teachings in Chapter 51, it is due to the merits of these past lives and the grace of the Supreme Lord that a disciple is fortunate enough to meet their Sadguru.