Why is a Guru's grace considered so essential for spiritual knowledge, according to Chapter 32?

According to Chapter 32 of the Sai Satcharitra, a Guru's grace is absolutely indispensable for attaining true knowledge. The text makes a powerful claim that even if a person has exhaustively studied the Vedas, Shrutis, and Shastras, all that learning is considered "mere chaff" without the grace of a Guru. This highlights that intellectual or scriptural knowledge alone is insufficient for genuine spiritual realization. The chapter reinforces this by stating that the very words from Sai Baba's mouth have the power to destroy sins and afflictions and, most importantly, cause one "to see one's own Guru." This implies that the Guru's grace is the active ingredient that transforms mere information into profound, liberating wisdom.