If a teenager doesn't know how to study early, he will regret studying late. If he wants to learn truly, he must work hard. Diligence is a good training, and one point of hard work is a point of talent. Learning without thinking is useless, thinking without learning is dangerous. Learn and then you can do it, think and then you get it. I try not to eat all day and stay up all night. It is useless to think, so it is better to learn. Learn extensively, inquire thoroughly, ponder prudently, discriminate clearly, and practice diligently. Industry is good at diligence and leisure, and success is ruined by thinking. Reading breaks thousands of volumes, and writing is like a god. Strive to know all the words in the world, and aspire to read all the books in the world. Birds flap their wings before flying high, and people study before making progress. If the clock doesn't strike or ring, people can't learn. If water doesn't flow, it will stink; People who don't learn will fall behind. Getting up early makes you wiser, and going to bed late makes you smell more. Sweat brings a bumper harvest, and diligent study gains knowledge.