“Hard work pays off. I am so annoyed at my father for being right about that”

Simplified Meaning:

When you put in a lot of effort and work hard, you eventually see good results. Sometimes, people, especially our parents, tell us this repeatedly, but we might not believe them until we experience it ourselves. Take, for example, a student who studies diligently for an important exam. They spend long hours reading and practicing, even when they'd rather do something fun. When they get their excellent grades, they realize that their hard work was worth it, and it turns out their parents were correct all along. This kind of realization can be a bit frustrating because it makes you feel like you weren’t right before. However, it's also a valuable lesson. Knowing that hard work leads to success can encourage you to keep working hard in different areas of your life, since you'll be more likely to achieve your goals.