How does Chapter 49 articulate the idea that Sadguru Sai's nature is fundamentally beyond human comprehension and speech?

Chapter 49 profoundly explores the inexpressible nature of the Sadguru. It begins by stating that even the Vedas and Puranas grew weary of trying to praise Him. The author explains that his own speech cannot describe Sai's inconceivable art. To illustrate this limitation, Chapter 49 references the four stages of speech, noting that the Sadguru's greatness is a place "Where the Para (transcendental) speech returns from... and there is no mention of Pashyanti or Madhyama." If these higher forms of speech fail, the author asks, "what of the fourth, Vaikhari (spoken word)?" This illustrates that the Guru's true form is beyond the limits of language and can only be approached through surrender at His feet, not through intellectual description.