Silence is associated with many virtues: modesty, respect for others, prudence, decorum. Thanks to deeply ingrained rules of etiquette, people silence themselves to avoid embarrassment, confrontation, and other perceived dangers. There’s an old saying that sums up the virtues of silence: “Better to be quiet and thought a fool than to talk and be known as one.”

A version of this article appeared in the May 2003 issue of Harvard Business Review.