Why should I trust a book written by someone who admits to being cynical and arrogant? What was the author's initial character?

The author, who would later be named Hemadpant, candidly describes his own initial flaws in Chapter 2. He states he was mischievous, talkative, cynical, critical, and prone to argumentation, with a mind full of pride in his own wisdom. However, the credibility of the work doesn't rest on the author's initial character, but on the divine mandate he received. Sai Baba Himself gave permission, stating, "He is merely a pretext; I myself shall write my own story!" This was contingent on the author dissolving his ego and surrendering at Baba's feet. Therefore, the narrative's authority is presented as divine, operating through a transformed human instrument.