How did Sai Baba reveal his omniscience to Cholkar during his visit to Shirdi?

Sai Baba demonstrated his all-knowing nature to Cholkar in a subtle yet profound manner. As narrated in Chapter 15, after Cholkar fulfilled his vow and was visiting with Jog, Baba gave a specific instruction to Jog: "Give him cups of tea, well-filled with sugar." This was deeply significant because Cholkar had secretly given up sugar as a penance for delaying his visit, a fact known only to him. Furthermore, Baba himself did not drink tea. This unexpected and specific command, detailed in Chapter 15, made Cholkar realize that Baba was aware of his secret vow and the personal sacrifice he had made. The incident confirmed Cholkar's faith, brought tears of joy to his eyes, and served as a powerful sign that Baba knew the state of his mind and his actions, even from afar.