"If you view life at 50 the same as you did at 20 - you have wasted 30 years of your life." -Muhamad Ali
I somewhat agree with this statement.. If you view life at 50 the same way you did at 20, then I think you really haven't acquired any kind of point of view to change your thought pattern from that of a 50 y/o to a 20 y/o.