How does Chapter 42 describe the power of a Sadguru and what does it promise to reveal about Sai Baba's specific nature?

Chapter 42 begins by describing a Sadguru as a "Wish-fulfilling Tree" who shows the way to cross the "river of worldly existence." It posits that through the Guru's grace, the distress and fear of this existence are removed, unhappiness turns into happiness, and the door to ultimate liberation opens. As recounted in this chapter, simply remembering the Sadguru's feet causes obstacles to dissolve. After establishing this general power, the narrative states that this chapter will specifically describe Sai's nature, exploring whether his mind was "intense or soft," and will also provide the account of him leaving his body.