How is Sai Baba described in relation to the Supreme Divinity in the fourth chapter of Sai Satcharitra?

In Chapter 4, Sai Baba is explicitly identified with the highest divine principles. The text states that He who brings joy to the world is the 'Inner Self, the Supreme God,' and that this Supreme God is the Guru, who is Sai. He is described as the 'Joy-giving Shankar,' eternal, non-dual, and beyond all limitations of place, time, or object. The chapter emphasizes the inadequacy of language to capture His essence, noting that the four levels of speech get tired of describing Him and that the Vedas, in their attempt, resorted to saying 'Not this, Not this' (Neti-Neti), signifying that He is beyond all worldly attributes and descriptions.