I believe that, people should learn self-confidence, to live happily in the world of today. This is true, because nobody knows you, as much as you know yourself. You cannot confide in the others, as you will do with yourself. Nobody will judge you better, than how you will be able to judge yourself. This is a true concept, @brightideas. It may determine how successful someone will become in the world.
I am @gboyegaogunmola. I am writer. I am writing article on the "psychological aspect of man". I think, those people who have no confidence in themselves, will loose many opportunities, and may never become successful in life. They are likely to be engaged and engrossed with what the other people think about them, whereby, they will fail to have self-direction towards achieving their goal.
Successful life is really based, somehow on self-confidence, and the personal merits of that person.