Song Luyou and the ancients didn't learn anything. It takes time to grow old. What you get on paper is so shallow that you never know what you have to do.
This is what Lu You taught children. He warned them not to neglect their studies, but to study hard from an early age in order to achieve something. The second half of the sentence tells children that learning is not only in words, but also in practice.
Words are simple and sincere, containing profound educational ideas and ardent expectations for children.
The father's pattern determines the outcome of the child, and the father's guidance to the child affects the child's life direction.