Think about it long enough, passionately enough and clearly enough, and the car will come to you. Of course, many thoughts are random and spontaneous. We get and reject thousands of thoughts each day. But thoughts are controllable. To live for the achievement while despising the journey is to cheat yourself of most of the joy of life.
Many people do lose the joy along the way.
If that happens to you, it's better to make the difficult choice and abandon the goal. There are an unlimited number of worthwhile goals in life. Instead, pursue a goal that energizes and delights you every step of the way. Same advice as above. All the positive thinking in the world is not going to change some things.