When I was younger, I wanted to understand everything that was taught to me in class. If the teacher presented it, I wanted to understand it. I was determined to get everything. This extended throughout my secondary and undergraduate education, where I made sure I could do everything that was asked of me.
Ask a mathematician or physicist to explain their work to you, and chances are you will hear them use the word “beautiful” at some point. This could reference an equation, a proof technique, an entire theory, or even just a nice piece of logic. They can talk to you for hours about this topic, explaining it in full detail with more enthusiasm than a lifelong sports fan.