" Our face is exquisitely expressive. Its features are incredibly mobile, more so than any other primate's. Because our face "speaks for itself" with muscular eloquence and candor, speech has comparatively few words (such as, e.g., "smile," "pout," or "frown") for its diverse gestures (see, e.g., TENSE-MOUTH and TONGUE-SHOW, which lack dictionary entries). Emotionally, the face is mightier than the word. "

― David B. Givens , The NONVERBAL DICTIONARY of gestures, signs and body language cues