The only difference between you and your dreams is "you."
After a few comments I decided to explain myself. If you want to be successful, you have to have big dreams. And small and medium dreams, too. They are all good. But the big ones are those that matter. How easy is to attain the big dreams? I think it is hard. It is so hard that most people stop before they achieve the dream. There are almost always obstacles; they will slow you down, they will try to stop you. But don't stop. You make the decision when to stop going after your dreams, so your actions and decisions make the difference between failing your dreams and achieving them.