Relevant famous sayings and aphorisms include:
1. The lights are on at three and the chicken is on at five, which is when men are studying. ("Encouraging Learning" by Yan Zhenqing of the Tang Dynasty)
2. Black-haired people don't know how to study early, and white-haired people regret studying late. ("Encouraging Learning" by Yan Zhenqing of the Tang Dynasty)
3. If a young man does not work hard, the old man will be sad. ("Collection of Yuefu Poems·Long Song Xing")
4. It's late spring before I realize that I am reading, every inch of time is worth every inch of gold. (Two Poems from White Deer Cave by Wang Zhenbai of the Tang Dynasty)
5. It is easy to learn when you are young, but it is difficult to become old when you are young. An inch of time should not be taken lightly. ("Occurrence" by Zhu Xi of the Song Dynasty)
6. Tomorrow comes after tomorrow, there are so many tomorrows, I live to wait for tomorrow, everything will be wasted. ("Song of Tomorrow" by Qian Fu of the Ming Dynasty)
7. If the world is tired of tomorrow, spring will pass and autumn will come. ("Song of Tomorrow" by Qian Fu of the Ming Dynasty)
8. Don't wait for a while. The gray head of a young man will make you sad. ("Man Jiang Hong" by Yue Fei of the Song Dynasty)
9. I advise you not to cherish your gold-threaded clothes, but to cherish your youth. (Du Qiuniang's "Golden Threaded Clothes")
10. Young and eager to learn, like the rising sun; strong and eager to learn, like the light of the sun; old and eager to learn, like the brightness of a candle. ("Shuo Yuan Jianben" by Liu Xiang of the Han Dynasty)?
11. The deceased was like a man who never gave up day and night. (The Analects of Confucius "Zihan")
12. When flowers bloom again, no one will be young again. (One of two poems written by Chen Chen of the Song Dynasty to encourage nephew Pu to reward wine and persuade him to drink wine)
13. Work is accomplished by hard work, but waste is caused by play; actions are accomplished by thinking, and destroyed by following. (Jinxuejie by Han Yu of the Tang Dynasty)
14. The prime of life will never come again, and it will be difficult to wake up again in one day. ("Miscellaneous Poems" by Tao Yuanming of Jin Dynasty)
15. Be encouraged in time, time waits for no one.
("Miscellaneous Poems" by Tao Yuanming of Jin Dynasty)