15. The best thing you do is something you want to remember in your old age. ——Aurelius

16. Don’t laugh at the elderly, because you will also be old. ——Menander

17. Young people should do no harm to others, should give to everyone what they have received, should avoid hypocrisy and deception, and should appear sincere and pleasing to others, so as to learn to behave uprightly. ——Comenius

18. The distinguished gentleman accused me of being young in a serious manner, as if I had committed a grave sin. I neither want to defend nor deny this. There is a kind of person who becomes wiser as he grows older; but there is a kind of person who remains as ignorant as ever no matter how old he or she is or how experienced he is. If I were the former type of person, I would be content. ——William Big Pete

19. Whether a person achieves success or not depends on whether he was ambitious in his youth. ——Xie Juezai

20. Hope that the hopeless fact/answer the difficult question/is the suicide of youth! ——Bing Xin

21. Young people, be careful, Anything that makes your eyes shine can often poison you, you should understand this! ——Shen Congwen

22. I like young people who have some of the advantages of older people, and I also like old people. There are certain advantages of young people in him. ——Cicero

23. Explore knowledge while you are young, it will make up for the losses caused by old age. Wisdom is the spiritual nourishment of old age, so you should work hard when you are young, so that you will not be empty when you are young. ——Windset