I seriously doubt that. Most of us start off with martial art when we were quite young. A lot of people here seem to be still at (high) school. I guess a lot of us started because we saw the cool moves on tv, or because we wanted to be tough or be able to defend ourselves. Why did you start? Self discipline, self control, respect, honor or courage is not something solely for martial arts. When you want to become good at soccer you need to have these things too. These things you probably can learn to a certain degree, but it also depends on who you are as a person. It is not something you get just by doing a martial art. There are many other factors involved.