When you know a thing, to hold that you know it; and when you do not know a thing, to… — Confucius
When you know a thing, to hold that you know it; and when you do not know a thing, to allow that you do not know it—this is knowledge.
From James Legge, Analects (PD)
More from Confucius
— ConfuciusTo know what is right and not to do it is the worst cowardice.
— ConfuciusIt does not matter how slowly you go as long as you do not stop.
— ConfuciusLearning without thought is labour lost; thought without learning is perilous.
— ConfuciusOur greatest glory is not in never falling, but in rising every time we fall.