"只有在困难时期，人们才会明白掌控自己的情感和思想是多么困难。"

Simplified Meaning:

When life gets tough, people often realize just how hard it is to control their emotions and thoughts. Imagine you're studying for a big exam. Everything seems fine until you find out you also have to help a sick family member. Suddenly, your stress goes through the roof. Keeping calm and focused seems almost impossible because you’re worried and overwhelmed. Normally, you might think you have a good grip on your feelings, but in situations like this, it becomes clear how challenging it really is. It’s during these difficult moments that you truly understand the challenge of staying calm and thinking clearly. This experience can teach you the importance of developing emotional strength and mental discipline. So, next time you're stressed, remember that everyone struggles with this and try to find ways to manage your feelings, maybe through relaxation techniques or talking to a friend for support.