According to Chapter 26, what is the essential role of a Guru in a disciple's spiritual journey?

In Chapter 26, the Guru is presented as the sole entity capable of granting the knowledge of Truth to a disciple and dispelling the illusion of Maya. The text emphasizes that when the Guru, who is God, is pleased, the true nature of the universe is realized. The author prays for the Guru to make his intellect turn inward and grant him the ability to discriminate between the eternal and the temporary. The chapter states that through the 'Great Sayings' of the Sadguru, the light of non-dual bliss shines forth, dissolving the dream-like perception of the world. Therefore, placing unshakeable faith in the Guru's words is paramount for spiritual awakening.