Why was Cholkar so amazed when Sai Baba told Jog to give him tea with extra sugar?

Cholkar's amazement stemmed from Sai Baba's omniscience. As part of a personal vow, Cholkar had secretly given up sugar until he could visit Shirdi, a fact he had not disclosed to anyone there. Chapter 15 recounts that just as Cholkar was leaving, Baba specifically instructed their host, Jog, to give him "cups of tea, well-filled with sugar." Hearing these words confirmed for Cholkar that Baba knew the secret details of his vow and the penance he had undertaken. This miracle, which confirmed his vow was accepted, brought tears of joy to his eyes and deeply solidified his faith.