What is the importance of a Sadguru according to the prayers and teachings in Chapter 26?

Chapter 26 places supreme importance on the role of the Sadguru. It explicitly states that in the world, only the Guru is capable of granting the knowledge of Truth to a disciple. The author's prayer to Sai Baba demonstrates this dependence, as he asks the Guru to make his intellect turn inward and grant him the discrimination between the eternal and the temporary. The text explains that the illusion of the world is dissolved through the 'Great Sayings (Mahavakyas) of the Sadguru.' The ultimate act of devotion shown in Chapter 26 is the complete surrender of the ego, where the devotee lays their 'me-ness' at the Guru's feet, trusting Him to look after them entirely.