How does Chapter 26 describe the role and importance of the Guru in a disciple's spiritual journey?

According to Chapter 26, the Guru is paramount and indispensable for spiritual awakening. The text states that in the world, only the Guru is capable of granting the knowledge of Truth to a disciple. It is through the Guru's words, the 'Mahavakyas,' that the light of non-dual bliss can shine forth and the illusion of the world can be dissolved. The devotee in this chapter prays for unshakeable faith in the Guru's words and asks Sai Baba to make this knowledge meaningful through direct, personal experience, emphasizing that without the Guru's grace and guidance, the mystery of the Self remains unsolved.