How did Sai Baba reveal his all-knowing nature to Sapatnekar, who felt constantly rejected?

Sapatnekar felt deeply distressed because whenever he approached Sai Baba, he was met with the rebuke "Chal Hat." This rejection caused him great anguish. However, he resolved to stay in Shirdi until he received Baba's grace. As described in Chapter 48, one day he found an opportunity to hold Baba's feet. Soon after, a shepherd woman arrived and Baba began a conversation with her. To Sapatnekar's astonishment, the story Baba told the woman was a detailed account of his own life, including the painful memory of his son's death. This miraculous event made Sapatnekar realize that Baba was omniscient and knew everything about him, filling him with deep respect and wonder.