How did Sai Baba specifically demonstrate to Cholkar that he was aware of his secret sacrifice?

Sai Baba demonstrated his awareness of Cholkar's secret in a remarkably personal way. After Cholkar finally arrived in Shirdi and distributed sugar to fulfill his long-delayed vow, he went to rest at another devotee's place. Chapter 15 recounts that as he was there, Baba explicitly told the host, Jog, to 'Give him cups of tea, well-filled with sugar.' This command was profoundly significant because Cholkar had secretly given up sugar as a penance during the period he was unable to afford the trip to Shirdi. Since Baba himself did not drink tea, this specific instruction was a clear and miraculous sign that he knew the secret details of Cholkar's mind and actions, causing Cholkar to be overwhelmed with joyful tears.