It is a truism that people want to believe in causes greater than themselves. That belief is central to the nature of purpose and its role in organizational intention, and even in the way we focus.
It is also true for leadership. Followers want to believe that their leader stands for something and, to an extent, might be better than anyone else at the job. Such conviction defines the reason followers defer willingly to leaders.
It comes down to doing well by doing good. In doing so, leaders provide followers with an example of purposeful and principled living. People not only want to follow such leaders but also do so with great enthusiasm.