Dream deep, for every dream precedes the goal. You accomplish nothing if you do that. Your mind must know it has to get down to work. Nothing great was ever achieved without enthusiasm. A rocking horse keeps moving but does not make any progress.
Persistence is the key.
Just never stop believing in your dream. We all put our underwear on feet first, so we are all human. Any fool can run in circles, but it takes a wise man to hurdle. Something might be gaining on you. If you train hard, you'll not only be hard, you'll be hard to beat.