What was the lesson Sai Baba imparted to the woman who intended to fast for three days in Shirdi?

According to the summary provided in Chapter 32, a woman arrived with a strong desire to have Sai Baba's darshan and observe a strict fast for three days without food. However, Baba intervened and broke her firm resolve. He had her prepare puranpolis and then made her eat them to her heart's content. The profound lesson imparted through this act, as stated in Chapter 32, is that "Wearing out the body for others' sake - this blessed act is true welfare." Baba demonstrated that selfless service and labor for others hold a higher virtue than the personal austerity of fasting, making her understand this principle in a way she would never forget.