To know, is to know that you know nothing. That is the meaning of true knowledge. When you say something, say what you know. When you don't know something, say you don't know. That is knowledge.
When the Superior Man eats he does not try to stuff himself; at rest he does not seek perfect comfort; he is diligent in his work and careful in speech. He avails himself to people of the Tao and thereby corrects himself. This is the kind of person of whom you can say, "he loves learning."
I do not enlighten those who are not eager to learn, nor arouse those who are not anxious to give an explanation themselves. If I have presented one corner of the square and they cannot come back to me with the other three, I should not go over the points again.
When you serve your mother and father it is okay to try to correct them once in a while. But if you see that they are not going to listen to you, keep your respect for them and don't distance yourself from them. Work without complaining.
Women and people of low birth are very hard to deal with. If you are friendly to them, they get out of hand, and if you keep your distance, they resent it.