of the past… is a doer; of the present, a planner; of the future, a teacher. Their job is to develop capabilities; not to plan the company’s actions but to increase its capacity to act, its responsiveness, and its repertoire…. This kind of leader doesn’t need to know everything; on the contrary, they will want to be surrounded by people who know a whole lot more but trust them to weigh their competing claims

– Thomas A. Stewart.