Could you give a summary of the story about Kaka Mahajani's friend who was against idol worship and his visit to Shirdi?

Chapter 35 tells the story of a friend of Kaka Mahajani who was a devotee of the formless God and averse to idol worship. He agreed to visit Shirdi out of curiosity but on the strict conditions that he would neither bow his head nor offer any Dakshina. However, upon arriving at the mosque, Sai Baba spoke to him in a voice that was an exact imitation of his deceased father's. As Chapter 35 explains, this experience so moved him that he forgot his resolve and immediately bowed at Baba's feet. Later, Baba twice asked for Dakshina, but only from Kaka Mahajani, ignoring the friend completely. This left the friend feeling restless, having had his preconceived notions and resolutions completely overturned by his encounter.