I read somewhere (so much on the internet that I don't remember where I see stuff!) that the essence of leadership is facilitating change. That is a thought that has stuck with me and I think that is true. It is also another explanation for the stress of church ministry - if we are leading a growing and changing organisation we are constantly walking a tight rope of pleasing people and yet bringing about change.
Management, however, is about the effective functioning of the status quo. And about the effective putting in and managing of systems after change.
Both are necessary and important.