Why was Balasaheb Deo able to read other books regularly but had so much trouble specifically with the Dnyaneshwari?

The source text in Chapter 41 highlights a peculiar and specific challenge Balasaheb Deo faced with the Dnyaneshwari. While he could maintain a regular reading schedule for other books, including a daily chapter of the Bhagavad Gita, his resolution for the Dnyaneshwari would not hold. The text explains that a unique internal obstacle arose with this specific scripture: "When taking Dnyaneshwari in hand, some doubts would arise in the heart, Due to which the reading remained superficial; love did not arise within." This suggests the difficulty wasn't a lack of discipline in general, but a specific spiritual or psychological block connected only to the Dnyaneshwari, which ultimately led him to seek Sai Baba's direct intervention.