What deeper spiritual lesson is taught through the miracle of the grapes in Chapter 35?

The miracle of the grapes demonstrates Sai Baba's profound method of guiding individuals to the spiritual path. As Chapter 35 states, Baba gives people inspiration and stimulates their natural disposition. For Boss Dharamsee, a man driven by logic and 'clinical scrutiny,' a direct, personal, and undeniable experience was necessary. The miracle was not a mere display of power but a targeted act to address Dharamsee's specific inner conflict and skepticism. By knowing his thoughts and transforming the grapes, Baba showed that He transcends physical laws to dissolve the devotee's ego. This act illustrates that becoming egoless and surrendering at the Guru's feet is the key to enjoying the 'festival of happiness,' as mentioned in Chapter 35.