What is the deeper, spiritual reason given in Chapter 39 for Sai Baba's arrival in Shirdi?

Beyond the narrative of accompanying Chand Patil's wedding party, Chapter 39 reveals a more profound spiritual purpose for Sai Baba's presence in Shirdi. The text asserts that Chand Patil was merely an instrument and that Sai Baba took his incarnation and came to Shirdi of his own accord. This was driven by a 'great concern for the upliftment of his devotees.' As explained in Chapter 39, his mission was specifically to uplift the 'dull-witted, the fallen, and the poor,' and simple, faithful people who lacked formal religious practices, demonstrating his boundless compassion.