Can you explain the transformation of Boss Dharamsee from a doubter to a devotee? What caused the change?

Boss Dharamsee's transformation was a direct result of a personal experience with Sai Baba's omniscience. As narrated in Chapter 35, he arrived in Shirdi with a skeptical mind, looking for proof of miracles. When given grapes with seeds, which he disliked, his skepticism grew. However, the pivotal moment came when Baba, knowing his thoughts, instructed him to eat the grapes, which miraculously turned out to be seedless. This event shattered his doubts. Chapter 35 states that his state of mind was stunned, his ego dropped away, and love for the saint was born in his heart. The very personal nature of the miracle turned his clinical scrutiny into an eagerness and firm determination to return to Shirdi.