How does Sai Baba describe the supreme nature and greatness of a Guru?

Sai Baba portrays the Guru as a figure of supreme spiritual importance, embodying the divine itself. In Chapter 19, he states that "the greatness of the Guru is immense" and that the Guru is nothing less than the "form of Hari, Hara, and Brahma," which represents the Hindu trinity of Vishnu, Shiva, and Brahma. This elevates the Guru beyond a mere teacher to the level of the ultimate creator, preserver, and destroyer. Baba's own experience reflects this; he describes his Guru as an "idol of devotion and love" who protected him with a simple, merciful glance. He taught that a disciple should have complete faith that the Guru is the "doer and the destroyer," underscoring the Guru's absolute power.