How did Sai Baba use a conversation with a Dhangar woman to reveal his knowledge of Sapatnekar's life?

The incident with the Dhangar (shepherd) woman is a profound example of Sai Baba's unique teaching methods. As Sapatnekar was massaging Baba's feet, a shepherd woman arrived and Baba began talking with her. However, as Chapter 48 recounts, Sapatnekar listened in astonishment as he realized every word of the conversation was actually his own life story. Baba narrated events from Sapatnekar's life, including the deeply personal and painful detail of his late son's death. Although the woman was the one responding, the story was entirely for Sapatnekar's benefit. This leela served as undeniable proof of Baba's omniscience, making Sapatnekar realize that Baba was the "knower of the inner self" and that everything was clear to him.