If we are confident, we can do anything and nothing is impossible. Most often people have very low-level confidence and they not even ever try to act. They under achieve than the goals set just because of this problem. There are admirable potentialities in every human being. Believe in your strength. As Mark Twain said, “All you need in this life is ignorance and confidence; then success is sure.” And we have to always remember, self-confidence is the first requisite to great undertakings. If we don't believe in ourselves, nothing can change and no one can change us. a self confident man does not have the word impossible in his dictionary. The word impossible should never be used by us, as we say most often things happen. Our mind will frame everything according to what we say and what we believe. So be confident.