Using Balasaheb Deo's experience, analyze the nature of obstacles in spiritual practice as described in the source.

The experience of Balasaheb Deo, as detailed in Chapter 41, provides a deep insight into the subtle and persistent obstacles that can hinder spiritual practice. Despite having a 'great desire' and 'strong intent' to read the Dnyaneshwari daily, some 'obstacle or other' would always arise. The text shows these were not just external issues, as even on a three-month leave, other tasks took precedence. More profoundly, the obstacles were internal; when he did try to read, 'doubts would arise in the heart,' making the reading feel 'superficial' and preventing love from developing. This illustrates that spiritual hindrances can manifest as a lack of connection or enthusiasm, leading him to realize that true practice requires divine grace, which is why he ultimately resolved to wait for Sai's direct command.