Can you explain the transformation of Boss Dharamsee? What does his story teach us about approaching a Guru?

Boss Dharamsee's transformation, detailed in Chapter 35, teaches a valuable lesson about approaching a Guru. He initially arrived with a critical mindset, questioning why people came to Shirdi and having a strong preference against the seeded grapes Baba offered. He even questioned in his mind if Baba was a true saint for not knowing his dislike. However, when he obeyed Baba's command to eat the grapes, he experienced a miracle as they became seedless. This experience completely changed him. As the scripture notes, his ego vanished, and love for Sai was born. The story suggests that one should approach a Guru by becoming egoless, as trying to understand their ways through a clinical lens can be limiting, whereas surrender can lead to the 'festival of happiness.'