Why does the author find it so difficult to describe Sai Baba's greatness in this chapter?

The author of the Sai Satcharitra expresses in Chapter 49 that describing the Sadguru's greatness is an impossible task because human language is fundamentally limited. He references the Vedic concept of the four stages of speech to illustrate this point. He notes that where the highest, transcendental form of speech ('Para') fails, the subsequent stages of 'Pashyanti' and 'Madhyama' also fall silent. Therefore, the fourth stage, 'Vaikhari' or the spoken word, is utterly incapable of capturing the Guru's 'inconceivable art.' The author concludes that Sai's divine play, or 'Leela,' is simply 'inexpressible,' and the best response is often silence, though his devotion compels him to try to share the stories anyway, as detailed in Chapter 49.