I'll give you an example from my own experience of dreaming big. My programming team was having trouble getting our product launched. They were whining something about it not being possible for the user input to be both yes and no at the same time. I told the weanies, "to hell with you and your concern about logical fallacies! Just get the #%!^@^$ program working!" They were being held back by what they saw as fundamental rules of logic. I saw it as a minor speedbump on the street to my big pay day. I was dreaming big on my goals and had the vision of the end product. The programming team was stuck in the piddily little details like feasilbility and implementation.
Learn to dream the impossible. Reality doesn't have to slow you down. As the annointed PHB, it's your job to think big. You pay the underlings to figure out how to make it happen.