Self Confidence and Over Confidence are very subtle. “I can do it” is self confidence and “Only I can do it” is over confidence.
You have to believe in yourself cause the rest of your life you have to live by proving it to others.
I always keep thinking about the above quote. it is so very true. If you yourself don’t believe in you then how can you expect someone else to believe you? Whatever we do and whatever we think has to happen in our life will surely happen. Being a kid we think that we can do whatever we want to achieve in life. This is Self Confidence, I have not come across one kid who says he can’t do something. It is always possible, nothing is impossible for kids. If they decide to do something, then they do it without any hindrance since their heart and soul will be in the same direction of getting it done. But this confidence decreases as the kid becomes adult and this is partly because of the society that we live in and the rest is because of oneself, we start realizing that we can’t do certain things. Truth is We can do anytime what we want in life.
Life provides you all the opportunities to do things that you love to do. It gives you all the strength but it is you who has to decide and move on. I have come across many people who say that they have not studied properly. Whose fault is it? Many attribute it to millions of reasons. But the truth is it is themselves who are responsible and not anyone else. This is because they believed that they can’t do it and that happened.
When I was a kid, I decided to become an engineer. I was fascinated by the computer and the games that I played on it (Prince of Persia was my favorite then). Today I am an engineer. This is because I wanted to become something and my heart and soul was towards it. I worked really hard to become one. There were many obstacles but still I was not disheartened and I really moved on with my goal. I believed that I can do it and I did it.
I am sure everyone can do what they decide to do. If they think they can do it they will surely do it. It is just your self confidence that matters. It is upto “YOU” to decide what you want and when you want and how you want things in life. You will be given that you wish for in your life.
A man is what he thinks and believes he is.
Be Confident in life. All the best.
Engineer's Finance 
Some nice insights here. Real self-confidence is being able to choose your behaviour with complete trust in that behaviour. That doesn’t mean that you know how it’ll turn out, just that you trust yourself to deal with whatever happens.
It’s a good feeling isn’t it?!
Keep doing what you’re doing.
Steve
@Steve:
Thanks Steve for dropping by. You are right.
It is a great feeling. Thanks for your encouragement. I am confident of getting things done in the way I want.
Keep visiting Steve.
I agree with you. Self confidence will help us do the things we want to do. Which also means that it will help us succeed in our goals or dreams in life. Believing in our self will help us DO the things we want to do and become positive in achieving it.