According to Chapter 26, what is the role of the Guru in understanding the true nature of the self?

In Chapter 26, the Guru is presented as the central figure capable of dispelling illusion and granting true wisdom. The text explicitly states that in the world, only the Guru can grant the disciple the knowledge of Truth. The author prays to Sai Baba, the Sadguru, to make his intellect turn inward and to bestow the ability to discriminate between the eternal and the temporary. True knowledge is said to arrive when the time for awakening through the Guru's word comes, and the author seeks to have unshakeable faith in the words of the Guru and Vedanta to achieve self-realization.