Black-haired people don’t know how to study hard, but white-haired people regret studying late. --Yan Zhenqing?

It is easy to learn when you are young, but hard to succeed when you are old, and an inch of time cannot be taken lightly. --Zhu Xi

If a young man does not work hard, an old man will be miserable. -- "Long Song Xing"

There are three steps of time: the future arrives belatedly, the present flies like an arrow, and the past stands still forever. --Schiller

Time is life, time is speed, and time is power. --Guo Moruo

My life has a limit, but my knowledge has no limit. -- Zhuangzi

Who is the stingiest with time, to whom time will be more generous. If you want time to live up to you, you must first live up to time. He who gives up time, time also gives up on him. --Goethe

An inch of time is worth an inch of gold, but an inch of gold cannot buy an inch of time. --Confucius

The plan for a year begins with spring, and the plan for a day begins with morning. --Lao Tzu

Those who never waste time have no time to complain about lack of time. ——Jefferson

Time is my property, my acres are time. ——Goethe

I am willing to stand on the street corner with a hat in hand and ask passers-by to invest their endless time in it. ——Berenson

Life is too short, there are too many things to do, and I have to race against time. ——Edison

Don’t waste your life lazily. ——Beethoven

Taking the road of "wait a moment" will only lead you to the room of "never". ——Cervantes

No matter how the gluttonous time devours everything, we must work hard to gain our reputation while this breath is still alive, so that the sickle of time cannot hurt us. ——Shakespeare