Why does the author of the Satcharitra find it so difficult to describe Sai's greatness, and what motivates him to write anyway?

In Chapter 49, the author expresses the immense difficulty in describing Sai's greatness, stating that His Leela is inexpressible and the Vedas and Puranas grew weary trying to praise the Sadguru. He references the limits of language, noting that where the transcendental speech (Para) returns and other stages like Pashyanti and Madhyama have no place, the spoken word (Vaikhari) is powerless. Despite this, he cannot remain silent. His motivation comes from the bliss he feels, which he compares to a sweet delicacy that must be shared with friends and listeners. This desire to share the bliss, coupled with direct inspiration from Sai, compels him to continue writing.