1 a gentleman doesn't hide his shortcomings; if he doesn't know, he asks; if he can't, he learns. (Dong Zhongshu of Han Dynasty)

2 Sensitive and eager to learn, not ashamed to ask questions. (Confucius and Qiu in the Spring and Autumn Period)

3 The enemy of learning is your own satisfaction. To learn something seriously, you must never be complacent. (Mao Zedong)

4 You don't know how to pretend to understand, you're a fool. (proverb)