According to Chapter 26, what is the indispensable role of the 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. The text emphasizes that the disciple's own intellect is often mounted on false logic, making the Guru's guidance essential to solve the mystery of existence. The devotee offers a heartfelt prayer to Sai Baba, asking Him to turn their intellect inward and bestow the ability to discriminate between the eternal and temporary. As described in this chapter, the devotee seeks to have unshakeable faith in the Guru's words and requests the Guru to make their mind like a mirror so that the stamp of self-knowledge may manifest. Ultimately, the Guru's grace is sought to provide a direct, personal experience of this knowledge, without which spiritual discourse is meaningless.