What was the deeper significance of the grapes turning seedless for Boss Dharamsee? Was it just a display of power?

The miracle of the grapes was far more than a mere display of power; it was a profound and personal teaching for Boss Dharamsee. As Chapter 35 explains, Dharamsee was troubled by a specific thought: 'If he is a saint, how does he not know That I do not like these grapes?' The miracle directly answered this internal challenge. When he ate the grapes and found them seedless, he realized Baba's omniscience, thinking, 'Knowing the intent of my mind... Whatever Sai gives me, they turn out to be seedless and beneficial.' The significance was in its precision—it targeted and dismantled his specific doubt and ego. This led to a complete transformation, where his 'clinical scrutiny' vanished and was replaced by genuine love and devotion.