If a young man does not work hard, an old man will be sad. ——Chang Ge Xing

Life is like an anvil, the more it is struck, the more sparks it can emit. ——Galileo

There are not many people who can remain unmoved, adhere to the right views, and survive the difficulties. ——Hugo

People without good will will be injured even if they are brave. ——"Huainanzi"