Shall I tell you what knowledge is? It is to know both what one knows and what one does not know.

Earnest in practicing the ordinary virtues, and careful in speaking about them, if, in his practice, he has anything defective, the superior man dares not but exert himself; and if, in his words, he has any excess, he dares not allow himself such license.

The whole end of speech is to be understood.

Music is the one thing in which there is no use trying to deceive others or make false pretenses.

I have never seen a man as fond of virtue as of women.

To acknowledge our faults when we are blamed, is modesty; to discover them to one's friends in ingenuousness, is confidence; but to preach them to all the world, if one does not take care, is pride.

To see and listen to the wicked is already the beginning of wickedness.