More generally, negative emotional states pull our attention to external things that we take to be their causes; but they are always accompanied by changes in posture and breathing which the external pull of the negative emotion hides. When someone is angry, for example, their eyes will widen, their hands will turn inward, they will lean forward, the muscles in their lower abdomen and pelvis will tense, and they will breathe harder. But someone in the grips of anger or any other negative emotion is focused on the person or thing they take to be the cause of their negative emotion, and, hence, they aren’t aware of what’s happening in their own body (we've all seen someone in the grips of anger yell "I'm not yelling!"). If, however, you can bring your attention to what’s happening in your body and correct the out of control physiological events that constitute the negative emotion – as, in the above example, if you can notice that your foot is pressed too hard against the brake and release it – your negative emotion will disappear. To a great extent we all know this is true; we all know that people suffering from negative emotions are out of control, and we all know that if your posture is perfectly relaxed and straight, and you’ve no tension in your face, hips or hands, and you’re breathing evenly and slowly through your nose, then it’s impossible that you are mentally disturbed in anyway. Most of our mental problems are due to our minds focusing on external things and, as a result, being unaware of the disturbances in our own body that actually constitute our mental problems. But, if you are having a problem it’s almost always a problem within you, and if you can learn to focus inwardly and control what’s happening in your own body, you can learn to control and eliminate negative emotions like anger, frustration, and sadness.