Based on Chapter 39, what was Sai Baba's purpose for incarnating and coming to Shirdi?

Chapter 39 explains that Sai Baba's presence in Shirdi was not accidental. While he arrived with Chand Patil's nephew's wedding party, the chapter asserts that this was merely the means. The true reason, as stated in the text, was Sai Baba's "great concern for the upliftment of his devotees." He took this incarnation and came to Shirdi of his own accord. As Chapter 39 rhetorically asks, who else but Sai would uplift the "dull-witted, the fallen, and the poor, those without vows, penance, or sacraments—simple and faithful people," emphasizing his mission to grace all, regardless of their station.