When I was young, I always felt that many things could be achieved with goals; After reading on, I realized that the unsolved problems in theoretical physics may not be fully understood in my career. Learn from it: don't do it. When I was young, I thought that doing theoretical physics meant doing applied mathematics, but later I was taught a lot by professors. I thought about it and decided to turn over a new leaf and be an image person. Later, I learned that when I was looking for a job, I was actually doing sales, selling the math problems you did.
"Why do you do this?" Without good physical contact, you will falter when you pick it up. Students who are determined to do theoretical physics are all top students in GPA when they are undergraduates; In the graduate school, there are a bunch of prodigies who are only twenty years old. Forget it. The students are all the same cow, and their sense of superiority is gone. The psychological gap is hard to accept at first.
But then I understood: there is no need to compare with others, do your own problems well, read more articles and observe other people's work. Young people always like to make the latest and hottest things. I do them again and again, which makes us unprofitable. "Sitting on this mountain and looking at that mountain, nothing can be done." Actually, I still focus on my own problems. It doesn't matter to learn more skills, but when it comes to defense, I only have one skill. Theorists always look down on people who do experiments, but they are jealous of people who make more money.