Can you explain the part about the River Ganges in Chapter 47? Why does it want dust from the feet of saints?

Chapter 47 presents a powerful metaphor involving the River Bhagirathi, or Ganges. The text explains that the holy river becomes soiled by washing away the sins and impurities of the world. To cleanse herself of this accumulated impurity, the river desires the dust from the feet of saints. As Chapter 47 describes, the Ganges knows that without the touch of a saint's feet, there is no deliverance from her own sins. This metaphor serves to elevate the status of saints like Sai Baba, highlighting that their purifying power is considered even greater than that of the sacred river itself.