How does the author use his self-professed lack of knowledge to glorify Sai Baba?

The author masterfully uses his own perceived shortcomings to magnify the grace of Sai Baba in Chapter 3. Despite being a Brahmin by birth, he claims to be "blind in the eyes of Shruti and Smriti," the core scriptures that are the 'eyes' of a Brahmin. He calls himself lowly, poor, and mindless, questioning his capacity for the great task of writing a saint's life. However, he reframes this deficiency as an "ornament" because it makes his reliance on Baba absolute. He compares himself to a blind man who can walk a straight path only with Baba as his guiding staff. This self-deprecation serves to highlight the central theme that it is Baba's inconceivable power, not the author's skill, that accomplishes the work, proving that with divine grace, even the mute can speak eloquently and the lame can cross mountains.