In what way does Chapter 4 describe Sai as the Supreme Divinity, and what does it say about the limits of language in describing Him?

Chapter 4 elevates Sai to the status of Supreme Divinity by identifying Him as the Inner Self, the Supreme God, and the Joy-giving Shankar. He is described as the object of ultimate love, eternal, non-dual, and beyond all limitations of place, time, or object. The chapter then delves into a philosophical point about the inadequacy of language to capture His true nature. It states that the four levels of speech—Para, Pashyanti, Madhyama, and Vaikhari—get tired of trying to describe Him. As evidence of this limitation, Chapter 4 notes that even the Vedas ultimately resorted to the process of negation, saying "Not this, Not this" (Neti-Neti) in their attempt to define the indefinable.