In this passage, Tolstoy highlights the importance of open-mindedness in understanding complex subjects. He argues that even the most challenging topics can be grasped by someone who approaches them without preconceived notions. This suggests that a fresh perspective allows for better comprehension, as the mind is unencumbered by prior beliefs or assumptions.

Conversely, Tolstoy warns that no matter how intelligent an individual may be, if they are convinced of their own understanding, they will struggle to learn anything new. This points to the cognitive bias that can hinder personal growth and knowledge acquisition. It's a call for humility and the willingness to reconsider what we think we know, which is essential for true understanding and learning.