What is the significance of making an offering to Sai Baba, based on the story of the grapes?

The story from Chapter 35 highlights the importance of the principle that one should not go 'empty-handed to the door of God, a priest, or a Guru.' Kaka followed this by bringing grapes as an offering, even though they were the seeded variety and not his first choice. The significance lies not in the material value of the offering, but in the sentiment behind it and how the Guru utilizes it. Baba took this simple offering of seeded grapes and transformed it into a profound teaching moment for the skeptical Boss Dharamsee. This shows that any offering made with sincerity can become a tool for the Guru to bestow grace and engineer spiritual growth for the devotees present.