How can you progress, grow, succeed and develop if you haven't spent time mapping out where you are aiming to go (defined your destination)? If you were planning to go on a trip, like I am currently, then you wouldn't miss the planning step of the journey would you?
What would happen if you did? You probably wouldn't even leave home, or if you managed to get that far I am sure your journey would be a lot less satisfying and successful than if you had planned in advance and adjusted that plan as you went on your way...