How does the fourth chapter of Sai Satcharitra portray Sai Baba's divine nature and relationship to the ultimate reality?

In Chapter 4, Sai Baba is explicitly identified as the Supreme Divinity. The text states that He who brings joy to the world is the Inner Self and the Supreme God, and that He is the Guru and the Joy-giving Shankar. This chapter describes Him as the object of ultimate love, eternal, and non-dual, beyond all limitations of place, time, or object. His nature is so profound that even the four levels of speech fail to describe Him, compelling the Vedas to resort to the 'Neti-Neti' (Not this, Not this) approach to point towards His indescribable essence.