 When I went to college, I got really interested in physics and decided to pursue a physics major. And I liked it so much I decided to apply to graduate school and was accepted and ended up going to University of Wisconsin. The classes were tougher than undergraduate school, but mostly through hard work and sometimes going to see my professors outside of class if I had questions. But a lot of persistence and hard work, I did pretty well in my first year of graduate school. When I got to my second year courses in graduate school, it got significantly tougher and I just hit a brick wall. I would go to class and take notes and often have little idea what the professor was talking about. This was a really difficult experience for me. I never before hit a time when through hard work and asking questions, I just couldn't figure out what to do. And for a while it made me lose confidence in myself to the point where I actually considered dropping out of graduate school at that time. I thought, well, if I need these courses to get my degree, if this is what I'm supposed to be able to do and I can't do it, maybe this isn't the right place for me. I was taking free courses at the time. All of them were tough. Two of them were really tough for me and I dropped one of those courses at the time. I stuck it out in the other two courses. I did well enough to get the credits. I didn't do great, but I did well enough. And what I did was the following year went back and retook the entire year of that quantum field theory course with a different professor who went at a slower pace. I had a very good relationship with that professor. I could understand how they were relaying the material to me and felt a whole lot better about my grasp of the material by the end. So what I learned from that experience is that roadblocks are going to come in your way and that's just part of life, whatever path you're trying to pursue. And so when you hit a roadblock, sometimes you have to look for a way around it or a different way to get where you're trying to get to if your strategies that you've tried so far don't seem to be working.