Why did Cholkar give up sugar, and how did Sai Baba acknowledge this personal sacrifice?

According to the account in Chapter 15, after Cholkar passed his exam, he was delayed in fulfilling his vow to distribute sugar candy in Shirdi due to his financial struggles, which the text calls the difficult 'threshold-ghat'. As a personal act of penance for this delay, he chose to abstain from sugar, even drinking his tea without it. Sai Baba acknowledged this secret sacrifice in a remarkable way. When Cholkar was visiting, Baba instructed his host, Jog, to give him 'cups of tea, well-filled with sugar.' This specific command revealed to Cholkar that Baba knew every detail of his private devotion, bringing him to tears of joy and confirming his faith.