"shine on you is better than blue" means that people can be improved after learning or education. It is often used to indicate that students surpass teachers or future generations surpass predecessors. Learn from Xunzi's exhortation: "In shine on you and shine on you, ice water is colder than water".

Original text:

Green is taken from blue, and green is blue; Ice, water, but colder than water. Wood is straight in the rope, not a wheel, and its curve is in the gauge. Although there is a crisis, those who stop coming forward will make it happen. Therefore, the wood is straight by the rope, the gold is sharp, and the gentleman is knowledgeable and saves himself, so he knows clearly without fault.

Use a large number of metaphors common in life to make the abstract truth clear, concrete and vivid, which is easy for readers to accept. There are various forms of metaphor, sometimes using similar things to set metaphors, explaining problems from the same angle repeatedly and emphasizing the author's point of view.