What is the significance of making an offering when visiting a Guru, as shown in the story of Kaka's visit to Sai Baba?

Chapter 35 highlights the principle that 'It is not good to go empty-handed to the door of God, a priest, or a Guru.' In accordance with this tradition, the devotee Kaka bought grapes to present to Sai Baba upon arriving in Shirdi. This simple act of making an offering became pivotal, as these grapes became the very instrument through which Baba performed a miracle for Boss Dharamsee. This demonstrates that a devotee's humble offering, regardless of its material value, can be utilized by the Guru in profound ways to impart spiritual lessons and transformative experiences, as clearly illustrated in the narrative from Chapter 35.