any strong emotion produces certain changes inside the body. for example, when a person is frightened or angry, his heart beats faster and the activity of his stomach stops. if he is frequently frightened or angry these changes will be taking place all the time. if this goes on for long, his health will be affected. he will begin to suffer from tiredness, stomach trouble, sleeplessness and loss of weight. these changes are sometime described as “suffering from his nerves”. actually, it is not his nerves that are responsible for his suffering, but his emotion.

　　people often speak of the need of control emotions. and intelligent man will constantly monitor(监视)his emotions. it is true that emotions can surge(汹涌) up so quickly that you may do something on the spur of the moment you will regret later. one thing you can do when you have a strong feeling ---- whether it is a good one or a bad one --- is to try to determine what caused it. if it is a bad feeling, then you will know to keep away from situation like that in the future. if it is a good feeling, then you will know what will give you more good feeling.

　　another way to control your emotions is to tall about how you feel with other people. if you can say why you feel bad, then you will be halfway to getting a grip(控制) on that feeling. it will be as though the thinking part of the brain is helping the feeling part of your brain slow down a little. some emotions are better avoided completely. the cold, sinister(恶意的), snake-like emotions of hate and jealousy(妒忌) should always be contained(泰然自若的) as soon as they begin to tempt(引诱) a person. jealousy and hate make a person mentally small and stupid. they should not be shown and they should be extinguished(熄灭).