zhyìng nán

Explanation:

Know: I know. It is easier to understand the truth of the matter, but it is more difficult to implement it.

Source:

Shangshu said: "Say' kowtow' and say' it's only difficult to do things you don't know. "Confucius Biography": "It is easy to know, but difficult to do."

Example:

Now that this question has been raised, Gai Yi ~, so he has to verbally support the vernacular, and hopes to cultivate health. (Lu Xun's quasi-romanticism, how do we educate our children? 》)