What is the central question that prompts the discussion in Chapter 48, and what are the ultimate signs of a Sadguru's presence mentioned in the text?

The discussion in Chapter 48 begins because a listener starts to wonder, "Is Shri Sai a Guru or a Sadguru?" To satisfy this query, the chapter outlines the characteristics of a true Sadguru. The ultimate signs of a Sadguru's presence, as described in this chapter, are a profound sense of selflessness and equality. Key indicators include a willingness to sacrifice for the disciple rather than receive service, an absence of ego, and treating all individuals as equals. Ultimately, Chapter 48 states that the place of a Sadguru is a "storehouse of supreme peace," where there is no pride in scholarship, only a fatherly love for the disciple.