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

Be aroused by poetry; structure yourself with propriety, refine yourself with music.

Look not at what is contrary to propriety; listen not to what is contrary to propriety; speak not what is contrary to propriety; make no movement which is contrary to propriety.

The superior man does what is proper to the station in which he is; he does not desire to go beyond this. In a position of wealth and honor, he does what is proper to a position of wealth and honor. In a poor and low position, he does what is proper to a poor and low position.

The gentleman calls attention to the good points in others; he does not call attention to their defects. The small man does just the reverse of this.

By nature, men are nearly alike; by practice, they get to be wide apart.

To err and not reform, this may indeed be called error.