According to Chapter 26, what is the indispensable role of the Sadguru in attaining spiritual realization?

Chapter 26 emphatically states that in the world, only the Guru is capable of granting the knowledge of Truth to a disciple. The Sadguru's role is presented as absolutely essential for transcending illusion. The devotee prays for the Guru to make their intellect turn inward and to bestow the power of discrimination between the eternal and the temporary. The chapter highlights that the 'Great Sayings' (Mahavakyas) from the Sadguru are what bring forth the light of non-dual bliss. Furthermore, it is only when the 'Guru-Soul, who is God, is pleased' that the true foundation of the universe is realized. True knowledge, as described in Chapter 26, is not just theoretical but must be made meaningful through personal experience, a gift granted by the Guru's grace.