According to Chapter 32, why is having a Guru so essential for gaining true knowledge?

Chapter 32 strongly emphasizes that a Guru's grace is indispensable for attaining true knowledge. The text explicitly states that even extensive study of the Vedas, Vedangas, and other scriptures is merely "chaff" without the grace of a Guru. It highlights a profound spiritual truth: all scholarly learning is futile if it is not blessed by a Guru's guidance. Furthermore, the chapter notes that listening to the words from Sai Baba's own mouth has the power to make one see their own Guru. This suggests that the Guru's role is not just to impart information but to facilitate a direct, internal realization of divine truth, which is impossible to achieve through intellectual effort alone, as mentioned in Chapter 32.