Can you tell me the story about Boss Dharamsee and the grapes he received from Sai Baba?

Certainly. The story of Boss Dharamsee, recounted in Chapter 35, illustrates a profound transformation. Dharamsee arrived in Shirdi with a skeptical mind. A devotee named Kaka had brought grapes with seeds as an offering to Baba. When Baba started distributing these grapes, Dharamsee was displeased as he disliked that variety and was also concerned about eating them unwashed. He even began to doubt Baba's sainthood for forcing something upon him he didn't like. However, Baba insisted he eat them. Upon obeying, Dharamsee was astonished to find the grapes in his mouth were completely seedless. This personal miracle, as Chapter 35 describes, caused his ego to vanish and replaced it with love for Sai. His amazement grew when he confirmed with another devotee, Tarkhad, that the grapes he had received did, in fact, contain seeds.