If you make a mistake, you will be hated for eternity, and if you look back, you will be hated for hundreds of years. "Abandoned Poems" by Tang Yin of Ming Dynasty.

Therefore, when Heaven is about to entrust a person with a great responsibility, he must first strain his mind and will, strain his muscles and bones, starve his body and skin, deplete his body, and mess up his actions. Therefore, tempting his heart and forbearance has benefited him. Can't. People always make mistakes, and then they can change; they are stuck in the heart, weighed by worries, and then act; they are marked by color, produced by sound, and then metaphor. If you enter, you will be unable to control the people at home, if you leave, you will be invincible to foreign patients, and the country will be permanently destroyed. Then I know that I was born in sorrow and died in happiness. "

----- "Mencius"