 Note there is a similarity between the present category of ability, as distinct from other powers, and the traditional category of active powers, where active powers are those that essentially involve the will (Reid 1788/2000). But it is not clear that these distinctions overlap exactly. For example, the power to will itself will clearly be an active power. It is less clear whether it will count as an ability, for the answer to that question will turn on the contentious question of whether willing is itself an action.