The superior man understands what is right; the inferior man understands what will sell.

It is goodness that gives to a neighborhood its beauty. One who is free to choose, yet does not prefer to dwell among the good - how can he be accorded the name of wise?

When you see a good man, think of emulating him; when you see a bad man, examine your own heart.

Without knowing the force of words, it is impossible to know more.

Know what you know and know that you don't know what you don't know — that is the characteristic of one who knows.

A gentleman would be ashamed should his deeds not match his words.

At fifteen my mind was directed to study, and at thirty I knew where to stand.