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. Don Yan Zhenqing's Poems to Encourage Learning
Reading breaks thousands of volumes, and writing is like a god. "Twenty-two Rhymes of Wei Dynasty" Tang Du Fu
A lazy youth, a lousy age. Chang ge hang Han Han Yuefu
There is a road in the mountain of books, but there is no limit to learning the sea. Han Yu's "Persuasion of Augmented Xianwen"