If someone's words do not match their nonverbal behaviors, you should pay careful attention. For example, someone might tell you they are happy while frowning and staring at the ground.
that when words fail to match up with nonverbal signals, people tend to ignore what has been said and focus instead on unspoken expressions of moods, thoughts, and emotions. So when someone says one thing, but his or her body language seems to suggest something else, it pays to pay extra attention to those subtle nonverbal cues.