What is the role of the Sadguru according to the philosophical teachings in Chapter 26?

According to the teachings in Chapter 26, the Sadguru is indispensable for spiritual realization. The text explicitly states that in this world, "only the Guru is capable of granting the knowledge of Truth to a disciple." It is through the Guru's Great Sayings (Mahavakyas) that the "light of non-dual bliss shines forth" and the illusion of the world dissolves. The author prays to Sai Baba to make his intellect turn inward and grant him the ability to discriminate between the eternal and the temporary. This highlights that the Guru is the one who purifies the disciple's intellect, instills unshakeable faith, and ultimately makes the experience of self-knowledge possible, solving the mystery of existence that false logic cannot.