I remember during my middle school years, some people were quiet and shy. They were so timid and lack of confidence that they were even afraid of hearing their own voice when they talked. But as years moved on, some of them changed to their opposite.
For timid and shy people, very often, it is a vicious cycle,– the more they are afraid, the less courage they have to hear their own voice, the more tightly they zip their lips. If they don’t venture out of their own shell of shyness, they will live a life of self-imposed confinement, a life of limited experience, without bringing out their full potential.
I keep telling my children that one’s characters are neither static nor pre-determined. It is up to them to experience what the life has richly offered and to build a strong character and cultivate a more open personality.