Can you walk me through the entire story of Cholkar, from his initial problem to the lesson he learned from Sai Baba?

Cholkar's story, found in Chapter 15, begins with his desperation to pass an exam for his job. He vowed to distribute sugar candy in Shirdi if he succeeded. By Baba's grace, he passed but was too poor to travel immediately. During this delay, he secretly gave up sugar as a personal sacrifice. When he finally reached Shirdi and fulfilled his vow, Baba revealed his omniscience. As Cholkar was with Jog, Baba instructed Jog to serve him tea 'well-filled with sugar.' This confirmed for Cholkar that Baba knew his secret penance. Baba then taught him that He resides in the hearts of all beings, knows everything, and is always with His devotees, regardless of physical distance.