The fantasy of making your dreams come true is useless. Moreover, it prevents you from doing so because your brain starts to believe that the goal has already been achieved. In fact, because of optimistic fantasies, your dream is exhaled like a soda in an open bottle - dissipating the energy that is necessary to keep the motivation and go to the end. The best results bring a combination of optimism and realism. It is important to believe that you can achieve the goal, but you have to pay attention to the obstacles that may arise in the process...