How did Sai Baba manage to get Kaka Mahajani's skeptical friend to bow down, despite his firm resolve not to?

Kaka Mahajani's friend, who was averse to idol worship, visited Shirdi with two strict conditions: he would not bow his head, and he would not offer Dakshina. However, his intellectual resolve was overcome by a profound personal experience. As described in chapter 35, the moment the friend stepped into the mosque, Sai Baba saw him and spoke to him. The tone of Baba's voice was a perfect imitation of the friend's deceased father, which left him completely astonished. The text notes that hearing this speech, as if from his father's mouth, caused the friend to melt inside and forget his previous vow. He was so moved that he spontaneously bowed his head at Baba's feet, demonstrating how Baba bypassed his intellectual defenses by touching his heart directly.