We must cheer up and study hard. There are three words for "hard work": one is "down", one is "suffering", and the other is "gong". You must cheer up and work hard.

The situation is constantly changing. To adapt your thoughts to the new situation, you have to learn.

If a young man doesn’t work hard, he will be sad

God rewards those who work hard

Three feet of ice will not freeze in a day

Don’t wait any longer. The young man's head has turned white, and he is filled with sorrow

When hundreds of rivers reach the sea from the east, when will they return to the west? If a young man does not work hard, the old man will be miserable.