1. To speak without knowing is unwise; to speak without knowing is unfaithful. ——"Han Feizi: First Meeting with Qin"

It is unwise to talk about things you don't know. It is disloyal to deliberately not tell something you know.

2. Don’t be tempted by praise and don’t be afraid of slander. ——"Xunzi·Fei Twelve Sons".

Don’t be tempted by false reputations, nor be frightened by slander.

3. Eyes are shorter than self-seeing, so use a mirror to observe the face; knowledge is shorter than self-knowledge, so use the Tao to correct yourself. ——"Han Feizi·Guan Xing"

People cannot see their own faces, so they need to use mirrors to see themselves. People's wisdom cannot recognize themselves, so they must use laws to strictly demand themselves.