How does Chapter 39 connect the story of Sai Baba's arrival with Chand Patil to his greater purpose for incarnating?

Chapter 39 presents the story of Sai Baba's arrival as a multi-layered event. On the surface, he arrived in Shirdi with the wedding party of Chand Patil's nephew after their initial encounter. However, the chapter delves deeper, stating this was just the visible mechanism. It clarifies that Chand Patil was merely an instrument and that Sai Baba came to Shirdi 'of his own accord.' The text explicitly states his greater purpose was the 'upliftment of his devotees,' particularly the 'dull-witted, the fallen, and the poor,' and those simple, faithful people without formal religious practices. This connects the seemingly coincidental arrival with a profound, self-directed mission of salvation.