How does Chapter 32 describe the importance of a Guru's grace in contrast to traditional learning?

According to the teachings in Chapter 32, the Guru's grace is paramount and indispensable for attaining true knowledge. The text explicitly states that even if a person has thoroughly studied the Vedas, Vedangas, Shrutis, and Shastras, all of this learning is considered "mere chaff" without the grace of a Guru. It emphasizes that true knowledge is impossible to achieve otherwise. The chapter further notes that listening to the words from Sai's mouth is a powerful act that can destroy sins and afflictions, much like the sight of the Ganga, and ultimately causes one to see one's own Guru.