The Master said, “You, shall I teach you what knowledge is? When you know a thing, to recognize that you know it, and when you do not know a thing, to recognize that you do not know it. That is knowledge.”
子曰：「由！誨女知之乎？知之為知之，不知為不知，是知也。」
Notes
This dialogue, between Confucius and his disciple Zilu (Ziyou), emphasizes intellectual honesty–recognizing the boundaries of one’s knowledge is itself a form of wisdom.
Contextualized within Zilu’s impulsive character (known in the Analects for rash declarations), Confucius implicitly warns against pretentious knowledge. The core advocates “cognitive sincerity”:
- Knowing what you know is clarity;
- Acknowledging what you don’t know is courage;
- Unifying both in word and deed is wisdom.
In an age of information overload, Confucius’ call for cognitive sincerity remains revolutionary: True knowledge begins where pretense ends.
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