Could you explain the metaphor of the River Ganges that is used in Chapter 47?

Chapter 47 employs a powerful metaphor involving the River Ganges to underscore the purifying power of saints. The text posits that the Ganges, by washing the feet and sins of the world, becomes soiled herself with accumulated impurities. To cleanse herself of this burden, the river is said to desire the dust from the feet of saints, wondering when they will come to bathe within her. As this chapter explains, the river knows there is no other deliverance from her sins. This analogy beautifully illustrates the supreme holiness of saints like Sai, suggesting their spiritual purity is so immense that even a sacred entity like the Ganges seeks them for its own purification.