Manners are the shadows of virtues; the momentary display of those qualities which our fellow creatures love, and respect. — If, we strive to become, then, what we strive to appear, manners may often be rendered useful guides to the performance of our duties.

Sydney Smith (1771–1845) English clergyman, essayist, wit

Sermon (1809 pub.), “On the Judgments We Form of Others”
    (Source)

Sermon on Leviticus 19:15.