The Leader is an Enabler
Within the context of the Mission-Men-Self ethos of servant leadership, the Leader enables those around him or her to transcend their personal expectations as a means for achieving the common purpose.
This may require the deflation of the ego-based self-esteem of some while enticing greater moral sufficiency in others, and may not be a pleasant experience in the moment.
But by submitting to Mission before Self, the Leader gains the moral leverage necessary to enable superiors and subordinates alike to be all they can be.