You don't know what people really are until they get what they want in life, maybe they are humor or proud
And even humor and proud is a trait in a every human beings which can't be changed. Some haven't even reach their peak and they still proud on nothing while some has got everything they need and they have the humour sense
It takes a deliberate act to change what we do not want but first, the person must realize that something need to change first. Humility is an act that can be learned, if truly desired.