How does the author use the concept of the four stages of speech to explain the indescribable nature of Sai Baba?

In Chapter 49, the author grapples with the inadequacy of language to describe the Sadguru's greatness. He employs the Vedic concept of the four stages of speech to illustrate this limitation. He states that when one attempts to sing the Guru's unfathomable greatness, the highest, transcendental speech (Para) simply returns. Even the subtler, pre-verbal stages of Pashyanti and Madhyama cannot grasp or articulate His nature. Consequently, the fourth stage, the spoken word (Vaikhari), is utterly powerless to describe Him. This philosophical explanation powerfully conveys that Sai's true form and greatness are beyond all human expression and comprehension, accessible only through grace.