The tragedy of life is not found in failure but complacency. Not in you doing too much, but doing too little. Not in you living above your means, but below your capacity. It's not failure but aiming too low, that is life's greatest tragedy.
The greater danger for most of us lies not in setting our aim too high and falling short; but in setting our aim too low, and achieving our mark.
Striving for excellence motivates you; striving for perfection is demoralizing.
The best motivation is self-motivation. The guy says, I wish someone would come by and turn me on. What if they don't show up? You've got to have a better plan for your life than that.