How did Sai Baba address the skepticism of a devotee like Boss Dharamsee?

Sai Baba addressed Boss Dharamsee's skepticism not with words, but with a direct, personal experience. As detailed in Chapter 35, Dharamsee arrived with a 'clinical scrutiny' and was inwardly critical of being offered grapes with seeds, a variety he disliked. He thought to himself, 'If he is a saint, how does he not know that I do not like these grapes?' Instead of explaining, Baba heightened the situation by giving him even more grapes and then commanding him to eat them. It was only when Dharamsee surrendered his will and obeyed that the miracle occurred—the grapes became seedless in his mouth. This experience was tailored to shatter his specific doubt. Chapter 35 states, 'His state of mind was stunned; he forgot his clinical scrutiny; All his ego dropped away, and love for the saint was born.'