What was the specific vow Balasaheb Deo made to Sai Baba regarding the Dnyaneshwari and what prompted it?

After numerous failed attempts to maintain a regular practice of reading the Dnyaneshwari, Balasaheb Deo became very distressed. Chapter 41 explains that his frustration led him to make a specific and firm vow. He resolved from his heart that he would only commence reading the Dnyaneshwari when Sai Baba personally gave him the love for it and explicitly said, 'Read.' He placed his faith entirely at Sai's feet, stating, "Only when Sai gives the order, Then only will I read the Dnyaneshwari." This vow was a direct result of his inability to overcome the obstacles on his own.