 Important differences stand out against this backdrop of agreement. Hume defines virtue in terms of the moral sentiments of a judicious spectator who views things from a common point of view. Kant, by contrast, defines virtue in terms of duty, obligation, and law. He thinks of virtue as moral strength, which is measured by an agent’s ability to defeat those inclinations that oppose the demands of the moral law (MM 6:405–407). Hume’s theory of virtue has a place for duty and law, but these are not the fundamental concepts in terms of which everything else must be explained or justified. Moreover, while Hume certainly recognizes virtues such as strength of mind, fortitude, and courage, they are not central to his view of virtue as such. Their status as virtues depends on the moral sentiments of a judicious spectator, as well as the exigencies and conventions of a particular age (EPM “A Dialogue”.40). For Kant, such factors are irrelevant to the basic question of what determines virtue and vice.