We should cheer up and study hard. Hard work, three words, one is called down, the other is called complaining, and the other is called work. You must pull yourself together and work hard.

The situation is constantly changing. If you want to adapt your mind to the new situation, you must study.

If a person doesn't work hard when he is young, he will regret when he is old ―― laziness when he is young will make him regret when he is old; Reckless youth makes regretful old age; Idle youth, poor old age

God helps those who help themselves.

Rome was not built in a day

Don't be idle, you are white-headed and sad.

The river runs to the sea, and when will it return to the west? A lazy youth, a lousy age.