In response to lou22sethut - People tell you that you can't do things that you wanna do throughout your life. Sometimes it feels like where goin nowhere and everything is movin so fast around us we "stop and stare". So don't spend your life "stopping and staring" otherwise you'll go nowhere.
I think the line "but i've become what i cant be" means that he has made the impossible possible. So the song ends on a positive note and gives a moral to the story/song. And that's basically what I got from it anyways.