What happened to Kaka Mahajani's friend who was skeptical about idol worship when he visited Shirdi?

According to Chapter 35, Kaka Mahajani's friend was a devotee of the formless and averse to idol worship. He agreed to visit Shirdi out of curiosity but on two conditions: he would not bow his head to Sai Baba, and he would not offer any Dakshina. However, upon arriving at the mosque, Baba spoke to him in a voice that was a perfect imitation of his deceased father's. This deeply moved the man, causing him to forget his resolve, and he spontaneously bowed his head at Baba's feet. Later, when Baba asked Kaka for Dakshina but not him, the friend felt restless, indicating a significant change in his heart.