Can Anyone Do Anything?

Dedication is how Jackson Pollock got from point A to point B. He was wildly in love with the idea of being an artist and thought about art all the time. Because he was so gung-ho, he got others to take him seriously and mentor him until he mastered all there was to master. If people have such potential to achieve, how can they gain faith in their potential? How can we give them the confidence they need to go for it?