How does Cholkar's story demonstrate Sai Baba's omniscience?

Cholkar's story is a profound demonstration of Sai Baba's omniscience. Cholkar made a vow and a subsequent personal sacrifice—giving up sugar—that he believed was a complete secret. According to Chapter 15, there was a significant delay between making the vow and fulfilling it, during which he maintained his sugar-free penance. When he finally arrived in Shirdi and completed his offering, Baba revealed His all-knowing nature. By instructing Jog to serve Cholkar tea 'well-filled with sugar,' Baba showed that He was intimately aware of the specific details of Cholkar's secret devotion. Baba then confirmed this explicitly, stating, 'The state of your mind at the time of the vow, and the penance of the long delay— Though you kept these secret, all of it is known to me.' This proved Baba's ability to know the innermost thoughts and actions of his devotees, regardless of time or distance.