How does the author explain the difficulty of describing Sai Baba's greatness in Chapter 49, particularly in relation to the concept of 'speech'?

The author of the Sai Satcharita expresses a profound struggle in Chapter 49 with capturing Sai Baba's essence in words. He calls Sai's Leela "inexpressible" and his art "inconceivable." To illustrate this limitation, he delves into the philosophy of speech, noting that even where the transcendental (Para), visionary (Pashyanti), and mental (Madhyama) stages of speech fail, the fourth stage, the spoken word (Vaikhari), stands no chance. This implies that the Sadguru's greatness transcends all forms of human expression and comprehension. The chapter suggests that the true form can only be grasped through surrender at the Sadguru's feet and by their grace, not by any attempt to describe it.