"Heaven will demote people, so they must first suffer their minds, work their bones and muscles, starve their bodies, empty their bodies, and mess up their actions. Therefore, being patient has benefited them. ..... then I know that I was born in sorrow and died in happiness. " (

This means that if a person wants to achieve great things, he must go through many hardships and hardships. Only by going through hardships and hardships and seeing the world, can he exercise his will, increase his talents and take on great responsibilities. Comfortable and enjoyable, growing up in a greenhouse, you can't develop the ability to overcome difficulties and get rid of adversity, you will be helpless in the face of difficulties, and you will be depressed and desperate in case of setbacks and adversity, which often leads to extinction. So he came to the conclusion: "Born in sorrow and died in happiness".

2. "Worry about the world first, and then be happy about the world" —— The Story of Yueyang Tower by Fan Zhongyan

It means: you should be sad before the world is sad, and then enjoy it after the world is happy. In the current words, it means suffering first, and enjoying later.

3, the taste of things for a long time is disgusting for a long time; The longer you read, the deeper you get. -Cheng Yi

When you work for a long time, you will feel disgusted, while reading is more and more interesting, and you won't feel disgusted. The fun you experience will be more and more profound.