According to the introduction of Chapter 51, what is the spiritual prerequisite for meeting a Sadguru, and what is the outcome for the disciple?

The introduction to Chapter 51 of the Sai Satcharitra explains the spiritual process behind encountering a true master. The text explicitly states that it is "due to the merits of past lives" that an individual obtains the grace of the Supreme Lord. This divine grace is the critical factor that "leads to meeting the Sadguru." The chapter further describes the positive result of this sacred meeting for the follower, noting that establishing a connection with the Sadguru serves to strengthen the "bliss of the disciple." This principle sets the stage for the story of Kakasaheb, whose deep bond with Sai is presented as a prime example.