Confidence and arrogance are two totally different things. If you confuse the two, you will most certainly become a very unhappy person with very few real friends. Arrogance is NOT a “quality” and it won’t help you reach your goals any faster.
Confidence in oneself, or the lack thereof is what stops people from getting tightly focused on what they want to achieve. That little voice telling them they can't do something is their biggest UN-motivator. What can YOU do to gain confidence?