Describe the analogy of the River Ganges that is presented in Chapter 47.

In Chapter 47, a powerful analogy is used involving the River Bhagirathi, or Ganges. The text explains that while the river washes the feet of the world, she becomes soiled herself with accumulated impurities. To wash away her own sins and achieve deliverance, she yearns for the dust from the feet of saints, wondering, "When will the feet of saints touch me? When will they come to bathe within me?" This metaphor, as found in Chapter 47, is used to illustrate the supreme purifying power of saints like Sai Baba, whose holiness can cleanse even the purifier.