After reading your post, my new thought is that a sense of accomplishment or interest can help people understand and learn knowledge. Because in your post, you mentioned the author’s point that learning knowledge is not the same as understanding knowledge, and you also mentioned that you learned the steps to solve the problem in your economics class, but you didn’t know why you did it in that way. And I have a similar experience to you, I was in the economics class I took last semester because I was interested in those points, so I would try to understand the way and method of it, but when I went to understand them because of my interest and sense of accomplishment, I learned at the same time. So I think the sense of accomplishment and interest can help people understand knowledge and learn it in the process of understanding. I agree that learning knowledge and understanding knowledge are not the same, but at the same time they are strongly connected and both are influenced by interest and a sense of accomplishment.