It's the job of a manager not to light the fire of motivation, but to create an environment to let each person's personal spark of motivation blaze.
Men are rather reasoning than reasonable animals for the most part governed by the impulse of passion. This is a truth well understood by our adversaries who have practised upon it with no small benefit to their cause. For at the very moment they are eulogizing the reason of men & professing to appeal only to that faculty, they are courting the strongest & most active passion of the human heart - VANITY!