John Adair on Leadership:
"...Leadership is the "raw material": the basic functional response to the three areas of need – the three circles [achieve the task, maintain the team, develop the individual] – in any working group or organisation. But the shape it takes varies according to the field. In the military, for example, the form it assumes is called command; in industry and commerce, it's known as management; and, in the church, it's proper name is ministry."
Not Bosses but Leaders 3ed p. 60