This document discusses the dangers of "empty concepts" in education. It argues that many students are rushed through courses without gaining a full understanding of concepts due to lack of relevant experiences. This results in students having boxes of knowledge without substance. The document traces the origins of this issue to ancient thinkers like Euclid and Cicero who viewed manual labor and direct experiences as inferior. It argues education should integrate conceptual learning with hands-on experiences to give concepts "weight" and prevent the accumulation of empty boxes of knowledge.