Self-confidence/assurance is a feeling of trust or confidence in one's abilities, qualities, skills, intellect, brain, strenght, character and stuffs like that. Now listen up, you should be self-confident/assured. But, never be overconfident/assured i.e. never be excessively confident or assured. For, your ability/quality/skill/intellect/brain/strenght or a stuff like that can fail or disappoint you even when you least expect it or rather when you need it most.
Self-confidence/assurance is simply all about being on a firm ground i.e. self-confidence/assurance is all about being 100% assured/confident of your self/potential/skill/ability/belief. Now that infers, whoever that is not assured/confident of his/her potential/skill/ability/belief is never self-confident/assured. So, dare to be self-assured/confident if you've not been self-confident/assured.
Somehow I can't believe that there are any heights that can't be scaled by a man who knows the secrets of making dreams come true. This special secret, it seems to me, can be summarized in four C s. They are curiosity, confidence, courage, and constancy, and the greatest of all is confidence. When you believe in a thing, believe in it all the way, implicitly and unquestionable.
The most valuable things in life are not measured in monetary terms. The really important things are not houses and lands, stocks and bonds, automobiles and real state, but friendships, trust, confidence, empathy, mercy, love and faith.
The real danger from advertising is that it helps to shatter and ultimately destroy our most precious non-material possessions the confidence in the existence of meaningful purposes of human activity and respect for the integrity of man.
The way to develop self-confidence is to do the thing you fear and get a record of successful experiences behind you. Destiny is not a matter of chance, it is a matter of choice it is not a thing to be waited for, it is a thing to be achieved.