What is broad and profound, and what is extremely clear and extremely cheap?

"Be broad and subtle, be extremely clear about the golden mean" is a classic sentence in The Golden Mean, and its meaning can be explained as follows:

"Be broad and precise": Committed to exploring the broad scope of things and pursuing a detailed understanding of things. This sentence emphasizes a comprehensive understanding of the world and an in-depth study of details.

"Brilliant golden mean": pursuing extreme wisdom and outstanding talents, but adhering to the impartial golden mean. This sentence emphasizes the pursuit of Excellence while maintaining balance and stability, and should not be too extreme or extreme.

The whole sentence can be understood as the pursuit of extensive knowledge and in-depth understanding, while maintaining balance and stability in the pursuit of Excellence. This sentence embodies the golden mean in Confucianism, that is, to pursue the golden mean balance in all aspects and avoid being too partial to one side in order to achieve harmony and perfection.