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

According to Chapter 26, the Guru is paramount and indispensable for spiritual progress. The text explicitly states that in the entire world, only the Guru is capable of granting the knowledge of Truth to a disciple. The author demonstrates this by offering a prayer to Sai Baba, asking Him to turn the intellect inward, grant discrimination between the eternal and temporary, and instill detachment. It is through the Guru's word that the time for awakening arrives. The chapter stresses that spiritual knowledge without direct experience, which the Guru facilitates, is merely an exhaustion of speech and ultimately fruitless. The Guru's grace is the sole means to achieve the natural state of union (Sayujya).