Impossible

Impossible, why do some people use this word? Why? Don't they believe themselves or other people? This word is used to people themselves haven't confidence. If you have confidence by yourself don't use impossible. In real life if you want to do something it is very possible in real life. For example 2007, September revolution in Burma might be considered it is impossible the monks will stir for people. But it was very possible. So, I want to tell everybody must try to make sure your goal and have confidence. There are lots of possible opportunities in front of you. Don't you think that it is impossible. It is possible in reality.