Internal fear can be a barrier for Personal development because of personal growth and they may be scared of changes a company may make within an organization. I know because with ex-marines in the army it is hard to get them accustom to or standards and ways , because of them being condition the marine way and some get their selves in trouble for the most part because they do have a barrier up and don't' get use to or ways.explain
Some people, once they get used to something, really don't like change. This goes further in others who really can't change and literally have panic attacks ...
Internal fear as a barrier