Private dreams are the most powerful. You have to dream of success to make it happen, and if you don't believe in yourself, nobody else will. But that doesn't mean you have to go around telling everyone about it.

This quote means that believing in yourself and your ability to achieve success is the most important thing that you can do. It is important to have the confidence to pursue your dreams and to know that you can do it, but it is not necessary to share your dreams with everyone. Keeping your dreams private and to yourself can be the most effective and powerful way to make them happen.