When faced with doubt, know that you are not alone and that your feelings are completely natural. With great faith or great belief comes great doubt, there is nothing wrong when doubt enters your mind. The problem occurs when you allow doubt to take control of your mind and keep you from taking action. You will make mistakes, and if you learn the lessons provided with each one you will grow. In order for you to overcome your doubt, you must make a decision. In most cases, it doesn't matter what decision you make, it only matters that you powerfully choose a direction. You can always correct your course if you don't like the direction you've chosen. Enjoy the journey, and make sure to focus on your progress, don't look for perfection or you will make yourself miserable.