I believe the quote "Believe you can and you're halfway there" means that knowing that you can do something gives you the motivation to do what you want and you're already halfway there. I can apply this to my life by showing that if I want to do something that I NEED to believe in myself. I could apply this to hockey, school, etc. This quote could make a positive change in someone's life because if they are feeling poorly about themselves then someone tells them this, they could realize that all they have to do is BELIEVE! This could impact the world the same way it could affect anyone's life. It can make them realize that believing is the key.