If you have the right map of berlin, then diligence becomes important, and when you encounter frustating obstacles along the way, then attitude can make a real difference. But the first and most important requirement is the accuracy of the map.
In any life situation you are always responsible for at least one thing. You are always responsible for the attitude towards the situation in which you find yourself. Your attitude is your reaction to what life hands you. You can have either a more positive or a more negative attitude. Your attitude is under your control and can be changed. With the right attitude you can be a resilient person. cheers.