Contentment

People are often not content with their lot. I think that it is the reason of advance of people. In the past, scientists invent a lot of equipment because of their need. I think it is a good phenomenon if the purpose is for human. Therefore, someone is not satisfied with his requirement. Many of them just fit their benefits and damage more people’s interests. I think those people’s behavior doesn’t deserve us to follow. An American novelist, Thornton Wilder, said, “It’s when you’re safe at home that you wish you were having an adventure. When you’re having an adventure you wish you were safe at home.” It states one of human nature. People are never satisfied his present situation.