There is one difference between science and art: science emphasizes the latest discoveries, the latest laws and equations, and the pattern is always renovated, and always runs straight forward. Art is not so convenient. No matter ancient or modern, there are no existing laws or equations can be used for plagiarism and application, so that art can form a relay race like scientific research. The subtle essence of this is that fathers cannot be taught to sons, and mothers cannot be taught to daughters. Everything has to be started from scratch on their own.
The main idea of this passage is the difference between science and art.