According to the story of Dharamsee, how is a person's ego an obstacle on the spiritual path, and how can it be overcome?

The story of Boss Dharamsee in Chapter 35 powerfully illustrates how ego acts as a barrier to spiritual experience. Dharamsee arrived with a 'clinical scrutiny' and an ego that led him to judge and doubt Sai Baba based on a personal preference for grapes. His mind was full of critical thoughts. The path to overcoming this, as shown in the narrative, is through surrender to the Guru. Baba orchestrated a miracle that directly shattered Dharamsee's intellectual pride. When the seeded grapes became seedless, his 'state of mind was stunned,' he 'forgot his clinical scrutiny,' and 'all his ego dropped away.' This implies that becoming egoless, often through a profound experience that transcends logic, allows one to 'enjoy the festival of happiness' and develop true love for the saint.