How does the story of Dharamsee and the grapes illustrate Baba's omniscience and method of teaching?

The incident with Boss Dharamsee powerfully illustrates Sai Baba's omniscience, or his ability to know a person's innermost thoughts. As Chapter 35 details, Baba was fully aware of Dharamsee's dislike for seeded grapes and his internal skepticism. Instead of simply giving him what he wanted, Baba initially gave him the very thing he disliked, seemingly in response to his rising doubt. This method served to challenge Dharamsee's ego and clinical scrutiny. The miracle was not just in changing the grapes, but in demonstrating that he knew Dharamsee's mind all along. Dharamsee himself realized this, thinking, "Knowing the intent of my mind... Whatever Sai gives me, they turn out to be seedless and beneficial." This shows Baba's teaching method: creating a challenging situation to break down ego before revealing his grace and power.