Could you explain the analogy of the River Bhagirathi used in Chapter 47?

Certainly. The analogy of the River Bhagirathi, or Ganges, is used to emphasize the supreme spiritual stature of saints like Sai Baba. As described in Chapter 47, the Ganges river washes the feet and sins of the world, becoming soiled in the process. To wash away her own accumulated impurities, she yearns for the dust from the feet of saints. The text states she knows that "without this, there is no deliverance from her sins." This powerful metaphor illustrates that the purifying power of a true saint is so immense that it is sought after even by a sacred entity like the Ganges, highlighting the unparalleled grace and holiness of Shri Sai.