Challenge

The one major factor that motivated people was the work itself. If the work was exciting and interesting, the worker looked forward to doing it and was motivated to do a good job.

That is what every successful person loves: the game. The chance for self-expression. The chance to prove his or her worth, to excel (勝過), to win.

Carnegie, D. (1981). How to Win Friends & Influence People (Revised Ed.) New York, NY: Pocket Books.