Emotion is a state of the individual which deprives him of his equilibrium. In fear, his teeth are clenched together, his body shudders and signs of perspiration may be seen upon his forehead. Emotions shake a man violently. Even when the object of his anger is no longer present, the person’s arms twitch uncontrollably. Emotions stimulate the energies of the creature and assist him in dealing with emergencies. In an emotional condition he performs actions which he is incapable of performing in a normal state. But sometimes, though comparatively infrequently, a person is absolutely stupefied and fails to perform even the ordinary activities. These mutually contradictory results bear testimony to the fact that it is difficult to define emotion. Though psychologists have not differentiated between motive, and emotion, everyday experience shows that there is some difference. Similarly, some psychologists do not find any difference between physical activities and emotions. But experiments reveal this difference which is by no means negligible. Emotion is a complex pattern of bodily and mental changes including physiological arousal, feelings, cognitive processes and behavioral responses to a personality significant situation.The physiological arousal includes neural, hormonal, visceral and muscular changes. The feelings include both a general affective state (good-bad, positive-negative) and a specific tone, such as joy or disgust. The cognitive processes include interpretations, memories and expectations. The over-behavioral responses include expressive reactions (crying, smiling) and action oriented responses (screaming for help).