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Hua
Never think you know everything.
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Pavlov
It is better to hide your strengths than your weaknesses.
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Feuerbach
The most knowledgeable people are always cautious.
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Rousseau
From thrift to luxury, from luxury to thrift.
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Sima guang
Luxury is the starting point of national weakness.
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Cuban proverb
In a threesome, there must be a teacher, choose the good one and follow it, and change the bad one.
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The Analects of Confucius
Teenagers are easy to learn when they are old, but old people are difficult to learn.
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Zhu's "Persuasion"
Mr. Wang said: I can't learn.
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