Why does the author of the Sai Satcharita describe Sai Baba's nature as 'unfathomable' and 'inexpressible' in Chapter 49?

Chapter 49 describes Sai Baba's nature as inexpressible because it transcends the limits of human comprehension and language. The author notes that even the Vedas and Puranas "grew weary of praising the Sadguru." He explains this difficulty by referencing the stages of speech, noting that where the transcendental (Para) speech returns and other stages (Pashyanti, Madhyama) are silent, the fourth stage, the spoken word (Vaikhari), is utterly powerless. Therefore, Sai's 'Leela' (divine play) is deemed unfathomable, and any attempt to describe Him fully is bound to be incomplete, as one cannot comprehend the "inconceivable art of the Unfathomable."