"Sometimes you are puzzled by someone’s facial expression; you can’t figure out what he meant. Or you can figure out what he meant by the look on his face, but you can’t decide whether or not to trust it. It is hard to check impressions with others, because there just isn’t much of a vocabulary for describing the face itself. There are a lot of words for the messages you get from the face (afraid, terrified, horrified, apprehensive, worried, to mention a few of those related to fear), but few to describe the source of those messages. We do have the terms smile, grin, frown, squint, but there are relatively few that identify particular facial configurations, distinctive wrinkle patterns, or temporary shapes of the facial features. Without terms to refer to the face, we are handicapped in comparing or correcting our interpretations of facial expression."