What was it about Sai Baba's voice that made Kaka Mahajani's skeptical friend change his mind so suddenly?

According to Chapter 35, the friend of Kaka Mahajani was a skeptic who vowed not to bow to Sai Baba. When he arrived at the mosque, Baba greeted him by saying, "Why have you come in this manner?" The power was not just in the words, but in the delivery. The text describes the tone as a "perfect imitation of his father's exact vocal style." Hearing a voice so "charmingly" and precisely like his own deceased father's, the friend was amazed and "melted inside." This profound and personal auditory experience caused him to completely forget his previous resolve and bow at Baba's feet, demonstrating the unique and moving ways Baba connected with his devotees.