The Most Important Thing that People have to Learn

There are many things to learn in our life and people think differently about what the most important skill is. I think the most important skills are manners and etiqquet.
First, manner is needed every where. Intelligence and knowledge are needed by people , but the most important thing I think is manner. In many countries manner is very important. All people need proper manners. They have to be polite. For example, in some dramas there are two people. They are rivals and they meet their master. One is polite and the other one is not polite so the master chooses the polite person.
Second, people acting polite or impolite is very important. To be polite or not polite can make one person's mind very different. When people are polite to other people a person can feel good. When people are not polite, a person can feel bad, so they have to be polite so manner is the most important thing I think.
In conclusion I think manner is the most important skill in our life because manner is needed everywhere and manners can change one's mind easily