8. "I do not think that there is any other quality so essential to success of any kind as the quality of perseverance. It overcomes almost everything, even nature." - John D. Rockefeller
10. "The secret of living a life of excellence is merely a matter of thinking thoughts of excellence. Really, it's a matter of programming our minds with the kind of information that will set us free." - Chuck Swindoll
15. "The secret of success is learning how to use pain and pleasure instead of having pain and pleasure use you. If you do that, you're in control of your life. If you don't, life controls you. - Tony Robbins