Based on Chapter 32, what is the importance of a Guru's grace in the pursuit of knowledge?

According to the teachings in Chapter 32, a Guru's grace is absolutely essential for attaining true knowledge. The text explicitly states that even if one has studied the Vedas and Vedangas or recited the Shrutis and Shastras, all of that effort is mere "chaff" without the grace of a Guru. It is emphasized that the words from Sai Maharaj's mouth have the power to destroy sins and afflictions, similar to the sight of the Ganga, and ultimately cause one to see one's own Guru, which is the key to genuine understanding.