According to Chapter 26, what is the indispensable role of the Guru in attaining spiritual knowledge?

Chapter 26 emphasizes that the Guru is absolutely essential for spiritual realization. The text explicitly states that in the world, only the Guru is capable of granting the knowledge of Truth to a disciple. This knowledge dissolves the illusory world of Maya. The chapter explains that through the 'Great Sayings (Mahavakyas) of the Sadguru,' the light of non-dual bliss shines forth, and the true nature of the Self is realized. The author prays for unshakeable faith in the Guru's words, recognizing that without the Guru's grace and the personal experience He provides, spiritual knowledge remains merely intellectual and ineffective.