Summary
This quote suggests that having erudition or knowledge is pointless if it is not applied or properly understood. It equates knowledge with dust, implying that mere accumulation of information without critical thinking or comprehension is futile. The phrase "empty skull" signifies a lack of understanding or intellectual capacity, emphasizing that knowledge alone does not contribute to one's intelligence or wisdom. Thus, the quote underscores the importance of not only acquiring knowledge but also being able to effectively utilize and comprehend it.