Can you explain the significance of a Guru as detailed in the teachings of Chapter 26?

In Chapter 26, the Guru is presented as absolutely essential for spiritual realization. The text explicitly states that in the world, only the Guru is capable of granting the knowledge of Truth to a disciple. This knowledge helps dissolve the illusion of the physical world. The author demonstrates this by praying to Sadguru Sai Baba, asking Him to make his intellect turn inward, to endow him with detachment, and to solve the mystery of existence that remains unsolved due to false logic. The ultimate plea is for the Guru's grace to make this knowledge meaningful through direct personal experience.