In saying no one else can live your life for you. No one else can succeed for you, what Og Mandino is trying to tell us is that you are the one who is in charge of your own life and only you can achieve your dreams. You have to do it on your own – no-one can do it for you, because they are not you. They do not have the same personal strengths, aims and ambitions as you do. In finding your purpose, only you can live your life and, ultimately, only you can ensure your own success