There are two types of people in the world. Although they have equal degree of health and wealth and other things, one becomes happy and the other becomes unhappy. This arises from the different ways in which they consider things, persons, events and the resulting effects upon their minds.

People who are to be happy fix their attention on the convenience of things: the pleasant parts of conversation, the well prepared dishes, the goodness of the wine and the fine weather. They enjoy all the cheerful things. Those who are to be unhappy think and speak only of the opposite things. Therefore, they are continually dissatisfied. By their remarks, they sour the pleasure of society, hurt many people, and make themselves disagreeable everywhere. If this turn of mind was founded in nature, such unhappy persons would be the more to be pitied. The intention of criticizing and being disliked is perhaps taken up by imitation (模仿）. It grows into a habit, unknown to its owners. The habit may be strong, but it may be cured when they realize its bad effects on their interests and tastes. I hope this little warning may be of service to them, and help them change this habit.

Although in fact it is mainly an act of the imagination, it has serious results in life since it brings on deep sorrow and bad luck. Those people offend many others; nobody loves them, and no one treats them with more than the most common politeness and respect. This frequently puts them in bad temper and draws them into arguments. If they want to get some advantages in social position or fortune, nobody wishes them success. Nor will anyone start a step or speak a word to favor their hopes. If they do something wrong, no one will excuse them, and many will join to criticize their wrongdoings. These should change this bad habit and be pleased with what is pleasing, without worrying needlessly about themselves and others. If they do not, it will be good for others to avoid any contact with them. Otherwise, it can be disagreeable and sometimes very inconvenient, especially when one becomes mixed up in their quarrels.

Caleb Anderson is a kid unlike any other. While most students his age are preparing for 7th grade, Caleb-from Marietta, Georgia-is starting his sophomore year of college.

The 12-year-old student is currently enrolled at Chattahoochee Technical College, where he is on track to earn his bachelor's degree in aerospace engineering in two years, according to CBS News. “I'm not really smart," Caleb told the outlet. “I just grasp information quickly. So, if I learn quicker, then I get ahead faster."But Caleb isn't just shooting for a diploma-he has his eyes set on joining the Georgia Institute of Technology or the Massachusetts Institute for Technology, which he hopes will help him get an internship(实习期） with Tesla and Space X founder Elon Musk.

“When I was like 1, I always wanted to go to space," he recently told USA Today."I figured that aerospace engineering would be the best path." Caleb learned sign language when he was 9 months old and kept improving after that. He started reading a few months later, then was able to solve math problems around his second birthday, CBS News reported. He was just 3 years old when he qualified for MENSA-a non-profit organization for people who score in the 98th percentile or higher in a standardized intelligence test.

Caleb's parents knew early that their child was one of a kind, especially when they talked to other parents. “As we started to interact with other parents, and had other children, then we started to realize how exceptional this experience was, because we had no other frame of reference," Caleb's dad, Kobi, told WKYC."He has far surpassed me in math, so I can't help him anymore," Caleb's mother, Claire, told WKYC that she hopes her son's example can show other African-American parents that their child can be just as special.

“I think people have a negative perspective when it comes to African-American boys," she said."There are many other Calebs out there. "

She continued,"From being a teacher-I really believe that. But they don't have the opportunity or the resources."

David was about 8 when he learned how to swim. He got so good that he eventually picked up free diving, a sport where divers hold their breath until resurfacing instead of using breathing equipment. He never imagined nearly two decades later he would come to use that skill in such a way.

It is an extraordinary act of courage, but to have the moment caught on camera for the world to see is something else entirely. The scene was filmed by someone on the same boat and was put online. The video was shared immediately by national and global media.

That August day began with David boating around with his friends. They spotted a woman driving a bright red Mazda heading right into high water. David and his crew tried to warn her to stop, but by then it was too late, and the car had already slid under water.

In the moments before David jumped into those muddy flood waters to tear the roof off the car with his bare hands, his thought process was short. In fact, he didn’t have one.

“The car was sinking fast,” David says. “There was no time to think. It had to be done.”

Up until recently, David hadn’t reunited with the woman he saved. He was perfectly fine with saving a stranger and remaining unknown to her.

Still to this day, even after the attention the video received, after the media from all over the globe landed on his front yard, David doesn’t think it a big deal. “I think I was just lucky,” David says, smiling. “I happened to be at the right place at the right time.”