How did Boss Dharamsee's experience with the grapes lead to his spiritual transformation?

Boss Dharamsee's spiritual transformation was a direct result of his personal experience with Sai Baba's omniscience and power. According to Chapter 35, he arrived as a curious skeptic, full of ego and "clinical scrutiny." His initial interaction was marked by dislike and doubt when given seeded grapes. However, when he obeyed Baba's command to eat them and discovered they had miraculously become seedless, his entire state of mind was stunned. The text states that all his ego dropped away, and love for the saint was born in his heart. This powerful, personal miracle, which addressed his specific inner thoughts, caused his previous resolves to vanish and fostered an eagerness to return to Shirdi that became a firm determination.