Can you elaborate on how Sai is described as the Supreme Divinity in Chapter 4?

Chapter 4 of the Sai Satcharitra elevates Sai to the status of the Supreme Divinity. It posits that He who brings joy to the entire world is the Inner Self and the Supreme God. The text further equates God with the Guru, specifically identifying Him as the 'Joy-giving Shankar.' This divine being is described as the object of ultimate love, eternal, and non-dual, existing beyond all limitations of place, time, or object. The chapter underscores the inadequacy of language to describe Him, noting that even the four levels of speech fail and the Vedas ultimately resorted to saying 'Not this, Not this' (Neti-Neti).