Competing against yourself
The truest measure of your success is not whether or not you're better than everyone else, but if you are better than YOU used to be! You can be better than everyone else and still be WORSE than you used to be, which is no reason to beat your chest in pride.
Source: Sales author/trainer Dave Anderson
Remember: Your objective is not to become successful and then let your pat on the back turn into a massage. Rather, your objective should be to strive to reach your maximum potential.
As long as you continue to grow, you will never reach your maximum potential. It is an endless journey. But it's the journey that keeps you moving; stretching; learning; hungry and humble.