Every day when the cock crows, it is the best time for boys to read. Teenagers only know how to play, but don't know how to study hard. When they are old, they regret why they didn't know how to study hard when they were young. -Yan Zhenqing

If you are persistent in sex, you are determined to win: therefore, those who are persistent in books must work hard, and those who are persistent in art must be good at skills. -those who are down and out, those who have accomplished nothing, all boast of themselves. -Po of Pu Songling