How is the Guru described in the introductory verses of the Shri Sai Satcharita?

The introduction to the Shri Sai Satcharita, found in Chapter 0, begins with powerful salutations that define the supreme nature of the Guru. One verse equates the Guru with the holy trinity, stating, 'The Guru is Brahma, the Guru is Vishnu, the Guru is Lord Maheshwara; the Guru is the manifest Supreme Brahman.' Another verse venerates the Sadguru as the personification of knowledge and the bestower of supreme happiness. He is described as being beyond dualities, eternal, pure, immovable, the witness of all intelligence, and the embodiment of the ultimate goal, 'That Thou Art.' This establishes the Guru's paramount importance from the very beginning.