How did Sai Baba manage to turn a skeptic like Boss Dharamsee into a devotee?

Boss Dharamsee initially came to Shirdi driven by curiosity, harboring a skeptical and clinical mindset. As described in Chapter 35, his transformation began with an internal conflict when Baba offered him grapes with seeds, a variety he disliked and was forbidden from eating unwashed. His skepticism peaked as he questioned why a true saint wouldn't know his preference. However, when Baba insisted and he finally ate the grapes, he was amazed to find they were seedless. This direct, personal miracle shattered his ego and critical scrutiny. The text states that his previous resolves vanished, love for Sai arose in his heart, and his desire to visit Shirdi became a firm determination, demonstrating a complete change of heart from skepticism to devotion.