B

    Here is an astonishing and significant fact: Mental work alone can’t make us tired. It sounds absurd. But years ago, scientists tried to find out how long the human brain could labor without reaching a stage of fatigue (tiredness). To the amazement of these scientists, they discovered that blood passing through the brain, when it is active, shows no fatigue at all! If we took a drop of blood from a day laborer, we would find it full of fatigue toxins (毒素) and fatigue products. But if we took blood from the brain of an Albert Einstein, it would show no fatigue toxins at the end of the day.

So far as the brain is concerned, it can work as well and swiftly at the end of eight or even twelve hours of effort as at the beginning. The brain is totally tireless. So what makes us tired?   

    Some scientists declare that most of our fatigue comes from our mental and emotional attitudes. One of England’s most outstanding scientists, J.A. Hadfield, says, “The greater part of the fatigue from which we suffer is of mental origin. In fact, fatigue of purely physical origin is rare.” Dr. Brill, a famous American scientist, goes even further. He declares, “One hundred percent of the fatigue of sitting worker in good health is due to emotional problems.”

    What kinds of emotions make sitting workers tired? Joy? Satisfaction? No! A feeling of being bored, anger, anxiety, tenseness, worry, a feeling of not being appreciated—those are the emotions that tire sitting workers. Hard work by itself seldom causes fatigue. We get tired because our emotions produce nervousness in the body.

法国前总统希拉克是个大个子。夏天的傍晚，他爱一个人漫步巴黎街头。一天，他发现一个小男孩紧跟在他后面，便回头亲切地问：“孩子，你是要我签名吗？”男孩摇头说：“不，我不需要签名。天太热，我走在你的影子里凉快些。”童言无忌，但希拉克却很愧疚，他从中悟出一个道理：人民并不看重我的虚名，而是要我给民以实惠。于是，他当晚写了一篇《我愿给你们带来阴凉》的演讲稿，并将其中的许多内容引入他的施政纲领。

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