 In discussing emotions in Summa theologiae II-1.22–48, Aquinas first divided them in terms of their generic objects: the concupiscible emotions react to what seems good or evil at the sensory level, whereas the irascible emotions react to arduous sense-good and sense-evil. The sensory moving faculties are activated by objects through cognition, and the modes of the resulting emotional movements serve as further qualifications in defining particular emotions. In employing the Avicennian conception of the estimative power that grasps the emotionally relevant aspects of objects, Aquinas says that this could be called particular reason in humans (Summa theologiae I.78.4) The recognizable evaluative property (such as being dangerous) could be called the formal object of emotion (Summa theologiae II-1.43.1; cf. Kenny 1963: 189; King 2011).