How did Sai Baba miraculously show Cholkar that he was aware of his secret sacrifice?

Sai Baba's omniscience was revealed in a subtle yet powerful way. As narrated in Chapter 15, after Cholkar had fulfilled his vow and was about to leave with his host, Jog, Baba specifically instructed Jog to "Give him cups of tea, well-filled with sugar." This instruction was astonishing because Baba himself did not drink tea, and it directly addressed Cholkar's secret, personal vow of abstaining from sugar. Hearing these words, Cholkar was amazed, and tears of joy filled his eyes as he realized Baba knew every detail of his vow, the delay, and his penance, confirming his faith completely.