Detailing your goal determines the difference between reaching it and falling short. The more detailed your goal is, the easier creating a plan of action will be. It gives you a clear picture of what you actually want to accomplish. It also keeps you motivated during the process because you are able to track your progression.
If your not passionate and fully committed to your dream, then you either need a different dream, or a stronger why. No matter what it is, if you want to be successful, you MUST have a strong why. A 'why' is the reason that you live, sleep, eat, and breathe what ever it is you that want to be successful at.