My friend is very skeptical about spiritual matters. How did Sai Baba handle people with a "clinical" or skeptical mindset who came to see him?

The story of Boss Dharamsee in Chapter 35 provides a powerful example of how Baba dealt with skepticism. Dharamsee visited Shirdi with a "clinical scrutiny" and was initially doubtful, even questioning in his mind why Baba would give him grapes with seeds, which he disliked. Baba, knowing his inner thoughts, miraculously changed the seeded grapes into seedless ones when Dharamsee finally ate them upon his command. This direct experience completely stunned Dharamsee, causing his ego to drop away and be replaced by love and devotion for Sai. As Chapter 35 describes, his "previous resolves vanished" and "love for Sai arose in his heart," demonstrating that Baba often used personal, direct experiences to transform doubt into faith.