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.

He with whom neither slander that gradually soaks into the mind, nor statements that startle like a wound in the flesh, are successful may be called intelligent indeed.

There is no body but eats and drinks. But they are few who can distinguish flavors.

Sincerity is the way of heaven.

The firm, the enduring, the simple, and the modest are near to virtue.

Men's natures are alike; it is their habits that separate them.

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.