Two of the hardest things to accomplish in this world are to acquire wealth by honest effort and, having gained it, to learn how to use it properly. Recently I walked into the locker room of a rather well-known golf club after finishing a round. It was in the late afternoon and most of the members had left for their homes. But a half-dozen or so men past middle age were still seated at tables talking aimlessly and drinking more than was good for them. These same men can be found there day after day, and, strangely enough, each one of these men had been a man of affairs and wealth, successful in business and respected in the community. If material prosperity were the chief necessity for happiness, then each one should have been happy. Yet, it seemed to me, something very important was missing, else-there would not have been the constant effort to escape the realities of life through scotch and soda. They knew, each one of them, that their productivity had ceased (停止). When a fruit tree ceases to bear its fruit, it is dying. And it is even so with man.

    What is the answer to a long and happy existence in this world of ours? I think I found it long ago in a passage from the book of Genesis which caught my eye while I was looking through my Bible. The words were few, but they became memorably impressed on my mind. “In the sweat of the face shall you eat the bread.”

    To me, that has been a challenge from my earliest recollections (memories). In fact, the battle of life, of existence, is a challenge to everyone. The immortal words of St. Paul, too, have been and always will be a great inspiration to me. At the end of the road I want to be able to feel that I have fought a good fight, I have finished the course, I have kept the faith.

    A team of UK researchers recently compared the performances of 120 women and 120 men in a computer test involving switching between tasks of counting and shape recognition.

    Men and women were equally capable when tasks were handled one at a time. But when the tasks were mixed up, there was a clear difference. According to the paper published in the journal BMC Psychology, both women and men slowed down and made more mistakes as the switching became more rapid. But the men were slower, taking 77 percent longer to answer, whereas women took 69 percent longer.

    To make the experiment more relevant to day-to-day life, researchers tried a second test. A group of women and men were given eight minutes to complete a series of everyday tasks, such as finding restaurants on a map, doing simple math problems, answering a phone call, or deciding how they would search for a lost key in afield. Once again, women outperformed men in the test, particularly in the key-searching task.

    “It suggests that in a stressed and complex situation women are more able to stop and think about what's going on in front of them,” researcher Keith Laws of the University of Hertfordshire, UK, told BBC News. “In contrast, men had a slight impulsiveness（冲动）, answering without giving much thought to their responses.”

    So where do women get the ability to keep organized under pressure better than men? Researchers believe that it has its roots in evolution. In early human communities, women had to keep an eye on children while cooking meals. Meanwhile, men only needed to focus on hunting.

    In modern society, it is usually considered good to be an extroverted(外向的) person. This means that life can be hard for introverted people. Their talents and abilities are often not recognized.

    Some people often try to make introverts more outgoing. They think that being an introvert is a problem. But there is nothing wrong about being an introvert. Introverts are not necessarily afraid of meeting and talking to others. They simply prefer to spend time on their own, away from the crowds. They like reading, writing and taking walks in the countryside. But extroverts need other people. If they spend a lot of time on their own, they get bored. They tend to be impulsive and talk a lot.

    Our society puts a lot of pressure on people to be extrovert, to be outgoing and self-confident on every occasion. Susan Cain, the author of the book Quiet: The Power of Introverts in a World That Can't Stop Talking, has spoken about this problem. "I was nine years old," Cain says. "In my suitcase there were lots of books. This seemed normal to me, because in our family we always read a lot. I thought it would be the same at summer camp. But I was wrong. To create camp spirit, all the children had to sing a cheer every morning. I couldn't understand why. In the evening, I took out a book from my suitcase. But another girl said, 'why are you being so quiet?' The second time I took out a book, the counselor(辅导员) came to see me. She told me to remember the camp spirit and that it was important to be outgoing."

    At work, extroverts often do well. At job interviews, it is usually good to appear extrovert. It suggests that you will be good at the job. But it is wrong to think that only extroverts are good leaders. Introverts work in different ways to extroverts, but they can still do really great things. Darwin, for example, was a quiet, family man. He often took long walks so that he could think clearly. But Darwin's ideas about evolution were revolutionary.

    Introverts must understand that it is perfectly okay to be the way they are. It is not necessary to want to be the center of attention. You don't have to take part in noisy, social activities if you don't want to. And it is not necessary to try to become more outgoing.

    My first impression of Miss Vicki was a highly authoritative(权威的) person towering over me. She spoke in a loud voice and the earth shook whenever she marched. That was in the first year of high school. She was a knowledgeable literature teacher then. However, during my first year in school, she struck terror into my heart(使我胆战心惊). And everyone else's of course. Just the mention of her name made the most unruly classes silent.

    Nevertheless, the two years of junior high passed by rather quickly. Soon, I went to senior high class. I had worked hard and gotten the subject combination that I wished for. Together with a group of old friends, I soon settled down in class comfortably.

    To everyone's surprise, she was fortunate enough to be my teacher that year. I was shocked when I heard the news. This time round, however, I decided not to hide in terror whenever she was near. I decided to face the fact that we were going to meet each other for the next 365 days. Instead of trying too hard to lick her boots, I tried my best to my natural self in front of her.

    Still, I could not shake off the ice-cold impression that she put in my heart. True, her jokes sometimes sent me into fits of laughter, yet at other times these jokes simply fell flat the moment she told them. My lovely class, however, was already ready to laugh at the right time of her amusing stories. After all, we would not want to run the risk of provoking(激怒) her.

    Unluckily, life was not to remain boring. One day we received news that Miss Vicki was to leave Singapore for the Philippines where she would take part in a voluntary teaching program for the poor. We did not know what to say actually. All of us cried at the airport.

    A few weeks ago, I called an Uber to take me to the Boston airport for a flight home for the holidays. As I slid into the back seat of the car, the warm intonations(语调) of the driver's accent washed over me in a familiar way.

    I learned that he was a recent West African immigrant with a few young children, working hard to provide for his family. I could relate: I am the daughter of two Ethiopian immigrants who made their share of sacrifices to ensure my success. I told him I was on a college break and headed home to visit my parents. That's how he found out I go to Harvard. An approving eye glinted at me in the rearview window, and quickly, we crossed the boundaries of rider and driver. I became his daughter, all grown up — the product of his sacrifice.

    And then came the fateful question: "What do you study?" I answered "history and literature" and the pride in his voice faded, as I knew it might. I didn't even get to add "and African-American studies" before he cut in, his voice thick with disappointment, "All that work to get into Harvard, and you study history?"

    Here I was, his daughter, squandering the biggest opportunity of her life. He went on to deliver the age-old lecture that all immigrant kids know. We are to become doctors (or lawyers, if our parents are being generous) — to make money and send money back home. The unspoken demand, made across generations, which my Uber driver laid out plainly, is simple: Fulfill your role in the narrative(故事) of upward mobility so your children can do the same.

    I used to feel anxious and backed into a corner by the questioning, but now as a junior in college, I'm grateful for their support more than anything. This holiday season, I've promised myself I won't huff and get annoyed at their inquiries. I won't defensively respond with "but I plan to go to law school!" when I get unrequested advice. I'll just smile and nod, and enjoy the warmth of the occasion.

    We are deep into January, and winter is in full swing. The days are short, grey, and cold, and many of us are fighting the annoying u Winter Blues". Yes, lack of sunlight can cause a type of depression called seasonal affective disorder (or SAD). Sunlight causes an increase in serotonin­a "happy hormone" ­in your body, and with a long winter ahead of us we must look for other choices to improve our moods.

    One of the best ways to fight off SAD is with light treatment. This treatment is safe, accessible, and easy and there is a wide range of different light lamps available on the market. After about 3 weeks of using the lamp for about 30 minutes a day, users report that their symptoms greatly improve. Most of these lamps are small and simple, and can easily slip into your home's decoration­just switch it on and carry on with your normal day.

    When buying your light treatment device(设备), keep a few things in mind. Make sure that the light you are buying gives off at least 10, 000 lux of light. Less than that and the light might not be effective. There are many reviews online, and it will be easy to find the best lamp for you.

    Try to find one whose bulb is easy to find and replace. You don't want to be stuck trying to figure out how to put the lamp back together.

    Finally, do your full research. There are so many different types and styles of lamp. Do you miss exercising outside? There is even one that you can put to your treadmill（跑步机）in order to copy running outdoors.

    There are larger lamps which are considered to be the most effective. There are small, nice lamps that don't take up too much space. There are modern designs such as vintage­style light­bulbs. There are even happy lamp alarm clocks, which are like sunrise, giving their users a gentle, natural wake­up.

    So, no need to go on a trip to Jamaica to get some sun and shake out the winter blues­instead, invest in a happy light which will keep your home sunny and happy all winter long!