Authority or leadership?

Dan Hotchkiss has an interesting piece up at the Alban Blog reflecting on distinctions between authority and leadership. He notes, for instance, that

Managers use their authority by making decisions; leaders exceed their authority by making others ponder troubling questions. Managers calm people by resolving ambiguity; leaders often frustrate people by refusing to decide quickly what can only be solved slowly. The most important challenges are too big for individual decision-makers to address alone. That’s where leaders come in to bring the whole group’s gifts to bear.