Sense of self

Compared to grownups, young children have a lower sense of self. That is, their sense of ego is not as big as adults. Adults who have more achievements than children tend to have bigger "egos".

As young children become teenagers, their confidence grow with their achievements, and so do their "ego", which I believe is actually bad. This is because parents cannot teach them as easily as when they were young children.

Teenagers who have small "egos" are not necessarily less confident. They are open to other peoples' ideas and comments even if those people are of less authority. What I mean is that we are usually receptive to ideas and comments from doctors, lawyers, judges and any other people who have "authority". However, most of us are not as receptive to ideas and comments from blue-collar workers, beggars, hawkers and hookers. Teenagers who have small "egos" are very rare. These people will make more friends, and they will learn more.